Learn To Program

Function Pointer As Struct Member

2011-05-30T00:56:00.001+07:00

Function pointer as struct member - with arguments:

#include <stdio.h>

struct aritmathic{
    int a;
    int b;
    int (*add)(int, int);
    int (*subtract)(int, int);
    int (*multiply)(int, int);
};

int Add(int a, int b){
    return (a+b);
}

int Subtract(int a, int b){
    return (a-b);
}

int Multiply(int a, int b){
    return (a*b);
}

int main(){

    struct aritmathic ar;
    ar.a = 4;
    ar.b = 5;

    ar.add = Add;
    ar.subtract = Subtract;
    ar.multiply = Multiply;

    int a = ar.add(ar.a, ar.b);
    int b = ar.subtract(ar.a, ar.b);
    int c = ar.multiply(ar.a, ar.b);    

    printf("%d\n%d\n%d", a, b, c);

    return 0;
}


Simpler version for above:
#include <stdio.h>

struct aritmathic{
    int a;
    int b;
    int (*add) (struct aritmathic*);
    int (*subtract) (struct aritmathic*);
    int (*multiply) (struct aritmathic*);
};

int Add(struct aritmathic* ar){
    return (ar->a + ar->b);
}

int Subtract(struct aritmathic* ar){
    return (ar->a - ar->b);
}

int Multiply(struct aritmathic* ar){
    return (ar->a * ar->b);
}

int main(){

    struct aritmathic ar;
    ar.a = 4;
    ar.b = 5;

    ar.add = Add;
    ar.subtract = Subtract;
    ar.multiply = Multiply;

    int a = ar.add(&ar);
    int b = ar.subtract(&ar);
    int c = ar.multiply(&ar);    

    printf("%d\n%d\n%d", a, b, c);

    return 0;
}

2011-05-30T00:46:00.000+07:00

Below is a simple example of function pointer as a member of struct:

#include <stdio.h>

struct data{
    void(*hello)();
};

void hello(){
    puts("Hello comes from C");
}

int main(){

    // the first way
    struct data d;
    d.hello = hello;
    d.hello();

    // the alternate way
    struct data dd;
    struct data* ptr = &dd;
    ptr->hello = *hello;
    ptr->hello();
   
    return 0;
}

Better Looking Search Box

2011-05-20T22:04:00.002+07:00

#search{
     border: 1px solid #ccc;
     max-width: -moz-fit-content;
     padding: 1px;
     -moz-border-radius: 5px;
}
#text{
     border: 0px solid #ccc;
     -moz-border-radius: 5px 0px 0px 5px;
     padding-left: 10px;
}
#submit{
     background: #88f;
     color: #fff;
     font: 14px arial;
     font-weight: bold;
     border: 0px solid #000;
     padding: 1px 5px;
     -moz-border-radius: 0px 5px 5px 0px;
     cursor: pointer;
}
#submit:hover{
     background: #55f;
}
form{
     margin: 0px;
     padding: 0px;
}

</style>

The result:

SSL - Generate RSA Key

2011-05-17T03:07:00.000+07:00

To simply generate rsa key to stdout in default 512

OpenSSL> genrsa

For 1024

OpenSSL> genrsa 1024

For saving it to file

OpenSSL> genrsa -out mykey.pem 1024

To generate public RSA key, use
OpenSSL> rsa -in mykey.pem -pubout

Read more on here

OpenSSL Introduction

2011-05-17T02:53:00.001+07:00

To encrypt a text file use:

OpenSSL> enc -base64 -in myfile.txt

or
OpenSSL> enc -base64 -in myfile.txt -out myfile.txt.enc
or just a test using pipe
D:\git\bin>echo "Hello World" | openssl enc -base64
To decrypt, use
OpenSSL> enc -base64 -d -in myfile.txt.enc
To decrypt from pipe, use
D:\git\bin>echo "encrypted" | openssl enc -base64 -d
Learn more on here

YUI - Starting

2011-05-15T20:36:00.002+07:00

Introduction

Here's a sample for how to start using YUI framework.
First, linking for the API

Code:

<script src="http://yui.yahooapis.com/3.3.0/build/yui/yui-min.js"    charset="utf-8"></script>

Second, make your control

Code:

Third, write the code

Code:

<script>
YUI.use('autocomplete', function(Y){
        Y.one('#ac-input').plug(Y.Plugin.AutoComplete, {
            source: ['apple','amazon','air','america']
    });
});
</script>

CSS - Advanced

2011-05-14T20:39:00.011+07:00

Introduction

Here's some code that show some advanced of CSS that is practical for use.

Rounded Box

It's easy to make a rounded box. Even you don't need use image for it.

Code

    <div>You don't need image for making box looks like rounded</div>

    <style>
    div{ 
    border: 1px solid #af0;
    padding: 5px;
    -moz-border-radius: 4px; 
    -webkit-border-radius: 4px;
    border-radius: 4px;
 }
    </style>   

The result will be:

You don't need image for making box looks like rounded

Box Shadow

May be you ask how to make Apple website's box shadow? It's easy to make it, you just need to add one line: -moz-box-shadow for mozilla gecko, or -webkit-box-shadow for webkit based engine (Safari and Chrome) or just box-shadow for modern browser.

CSS Code

  <div>Looks, it like apple box</div>

  <style>
  div{
      border: 1px solid #ccc;
      padding: 5px;
      -moz-box-shadow: 0 0 4px #88f;
      -webkit-box-shadow: 0 0 4px #88f;
      box-shadow: 0 0 4px #88f;
}
  </style>  

The result will be:

Looks, it like apple box

Nicer ComboBox

Here's the code will make the combobox looks nicer.

HTML Code:

    <select>
    <option>Select A Fruit</option>
    <option>Apple</option>
    <option>Banana</option>
    <option>Mango</option>
    <option>Orange</option>
</select>

<style>
select{
    border: 1px solid #ccc;
    padding: 1px;
}
</style>   

The above will result:

GAE - Template

2011-05-10T23:58:00.004+07:00

Introduction

Template makes your life easier. it separating between code logic of your program to what should display on the browser. Here's I just show up what the crucial template case that not handled by Django documentation.

Displaying List of Articles

It's really some often occurance for us to display item list. It's like blog post that consits of title, date, and content. Or it like personal data that consists of name, email, address and more. Here's for example we has some blog post:

Data Content

Title	Content
GAE Template	GAE Template is use Django template system. So when you are accustomed for using Django, it's good for you.
GAE Runtime	There are two available runtime for you. The first is Java and the second is Python. Whatever you choose, it should based on your preference for the language and your current skills.
GAE Datastore	In GAE, your data is saved in database, but you never handle it directly, because Google Datastore that handles it, and in all your time, you handle the datastore. The operation for data in datastore is like in native sql, but it's more abstract than it that is called GQL - Google Query Language.

For example you want to display the data on the home page, what you need is you main the logic code that retrieves the data using Google datastore query.

Program code: main.py

from google.appengine.ext import webapp
from google.appengine.ext.webapp.util import run_wsgi_app
from google.appengine.ext import db
from google.appengine.ext.webapp import template

class Blog(db.Model):    title = db.StringProperty()
    content = db.TextProperty()

class MainPage(webapp.RequestHandler):
    blog = Blog()
    query = db.GqlQuery("SELECT * FROM Blog")
    data = []
    for row in query:
        mapp = {}
        mapp['title'] = row.title
        mapp['content'] = row.content
        data.append(mapp)
 

GAE - Introduction

2011-05-10T23:36:00.004+07:00

Introduction

Google App Engine is the platform for building web application. There's a built-in framework and already hosting servince provided by Google. The application environtment is two: Java and Python. Whenever you choose one, it's up to you.

How To

To starting development, you can download it first from code.google.com. Here we use Python version environment. After finishing for downloading, please install it.

The first is create directory, named "Hello" in whatever you want to place it - for example in "D:\\Hello". The second, is create two files: app.yaml and main.py, and then write this code.

app.yaml

  application: hello
  version: one
  runtime: python
  api_version: 1

  handlers:
  - url: /.*
    script: main.py
 

main.py

  print 'Content-Type: text/html'
  print ''
  print '<h1>Hello World From GAE!</h1>'
 

Now run the server by opening command line:

Input: command line

C:\\Program Files\\Google\\google_appengine\\dev_appserver.py D:\\Hello

Output: command line

INFO 2011-05-10 16:44:52,967 appengine_rpc.py:158] Server: appengine.google.com
INFO 2011-05-10 16:44:53,015 appcfg.py:437] Checking for updates to the SDK.

****************************************************************
There is a new release of the SDK available.
-----------
Latest SDK:
api_versions: ['1']
release: 1.5.0
timestamp: 1301428458

-----------
Your SDK:
api_versions: ['1']
release: 1.4.3
timestamp: 1298921951

-----------
Please visit http://code.google.com/appengine for the latest SDK
****************************************************************
INFO 2011-05-10 16:44:55,812 rdbms_sqlite.py:58] Connecting to SQLite databa
se '' with file 'c:\\docume~1\\mahasi~1\\locals~1\\temp\\dev_appserver.rdbms'
WARNING 2011-05-10 16:44:55,828 dev_appserver.py:4394] Could not initialize ima
ges API; you are likely missing the Python "PIL" module. ImportError: No module
named _imaging
INFO 2011-05-10 16:44:55,890 dev_appserver_main.py:543] Running application
lola on port 8080: http://localhost:8080

No open your browser, and directed to http://localhost:8080

JS -- AJAX

2011-05-09T01:53:00.009+07:00

Introduction

AJAX is a mechenisme for communicating with server through background. It enables your client web site to load and sending data from and to server respectively without reloading the page.

Sending Data To Server

Here's a simple example on how to use ajax.

Program Code: Client Side

    <input type="text" id="name"/>
    <input type="button" value="Send" onclick="sending()"/>

    <script>

     function sending(){

       var name = document.getElementById('name').value;
       var ajax = new XMLHttpRequest();
       ajax.open("GET", "hello.php?name="+name, false);
       ajax.send();

     }

    </script>   

It's not so complicated. The fisrt, you have the data. The second, you declare an object instance of ajax throught XMLHttpRequest. Then you send your data through ajax. Finish.
And on the server side, you need to write the code to handle it. Here's a code on PHP.

Program Code: hello.php

$name = $_GET['name'];

From the above code, you see that you handling the data as it comes from common request.

Receiving Data From Server

After showing you on how to send data to server, now we are ready to handling the response data from server. Here's a code.

Program Code: hello.php

echo "Hello From Server";

The above code is the server code for sending to client. Below is the client code.

Program Code:

    <h1>Message From Server:</h1>
    <h2 id="msg"></h2>
    <input type="button" value="Send" onclick="receive()"/>

    <script>

    function receive(){

      var msg = document.getElementById('msg');
      var ajax = new XMLHttpRequest();
      ajax.open('GET', 'hello.php', false);
      ajax.send();
      msg.innerHTML = ajax.responseText;

    }

   

In the above code, we will get the message from server and then display it.

Special Case: Ajax For Local File

If you have no web server, don't be hopeless. Because you can try simple ajax processing using local file. Here's a step: create a directory on D:\, and name it ajax. Then open an text editor, write this text below, and save it as hello.txt

Text File: hello.txt

Hello. This comes from local file.

Then make second file, write this code and save it as lola.html

Program Code: lola.html

     <h1>What the message from a local file?</h1>
     <h2 id="msg"></h2>
     <input type="button" value="Load..." onclick="load()"/>

     <script>

     function load(){

       var msg = document.getElementById('msg');

       var ajax = new XMLHttpRequest();
       ajax.open('GET', 'hello.txt', false);
       ajax.send();

       msg.innerHTML = ajax.responseText;

    }

    </script;>    

JS - JSON

2011-05-09T00:25:00.016+07:00

Introduction

JSON is a data format for transferring data as an alternative to XML. JSON is ligter than XML. The syntax is like mapping.

Program Code

    var data = {
      "name": "Lady Gaga",
      "city": "New York",
      "age": 24
   }   

In the above example, we have JSON data format.

Accessing And Modifying

For accessing JSON data, we use dot operator. For above example, we use

Program Code

    var the_name = data.name;
    var the_cityy = data.city;
    var the_age = data.age;
    alert("Name: "+ the_name +"\nCity: "+ the_city +"\nAge: "+ the_age)   

Output

Name: Lady Gaga
City: New York
Age: 24

You also use the dot operator for modifying the data.

Program Code

    data.name = "Jenifer Lopez";
    alert("Name: "+ data.name);   

Output

Name: Jenifer Lopez

In the above code, we modify the data name from "Lady Gaga" to "Jenifer Lopez"

Transfering JSON Data Through Ajax

JSON is very suitable for transferring data from client to server. The first step, you encode your data to JSON format, then sending it through AJAX. After it arrived on the server side, then processing it as server code. Here's we will use PHP as server code.

Program Code

   <div>Name: <input type="text" id="name"/></div>
   <div>City: <input type="text" id="city"/></div>
   <input type="button" onclick="sending()" value="Send Data"/>

   <script>

    function sending(){
       var name = document.getElementById('name').value;
       var city = document.getElementById('city').value;

       var data = {"name":name, "city":city};

       var ajax = new XMLHttpRequest();
       var json_data = JSON.stringify(data);
        ajax.open("GET", "hello.php?data="+ json_data, false);
       ajax.send();
    }

   </script>  

In the above code we use JSON for transferring data - name and city - to server. The process is follows: After you get your data, you change the data format to json data format. Then you use JSON.strigify(json_data_format_here) to formatting it to string literal. You can try that this is a string literal by writing alert(json_data). And the last section is that you let AJAX to handle the transfer process.
On the server side, you need to write this code.

Program Code: hello.php

  $json_data = $_GET['data'];

  // conver the json data format to associative array
  $data = json_decode($json_data);
  
  // get the name and city
  $name = $data["name"];
  $city = $data["city"];
   

The above is a code on how to handle json data format from client. The first step, you catch the data value using commong global GET variable. But the data in this stage is till in the form of JSON string, so we need to convert it to PHP array for conveniently handling - here we use json_decode().

Handling JSON Data From Server

It's also convenient to handling the received data from the server. Here's a practical example using PHP. Write this code in hello.php

Program Code: hello.php

   $data = {
     "name" => "lady gaga",
     "city" => "new york"
   }
   $json_data = json_oncode($data);
   echo $json_data;  

In the above code, you see that the data type is associative array. Yes, JSON and associative array, map or dictionary is same. All of them has feature key value pairs. The firstly, we have data in the format of associative array, then we encode it to JSON format through json_encode. After that we display it using echo - sending to client if requested.
On the client side, the code is:

Program Code

     <h1>Name: <span id="name"></span></h1>
     <h1>City: <span id="city"></span></h1>
     <input type="button" onclick="load()" value="Load JSON Data"/>     
     <script>

     function load(){
       var name = document.getElementById('name');
       var city = document.getElementById('city');

       var ajax = new XMLHttpRequest();
       ajax.send("GET", "hello.php", false);
       var data = eval('('+ ajax.responseText +')');

       name.innerHTML = data.name;
       city.innerHTML = data.city;
     }

     </script>    

Python - File Reading And Writing

2011-05-08T23:45:00.005+07:00

Introduction

File operation is necessary in every programming.In Python, file handling is comparatively easier than the other language.

Reading A File

For reading a file, you can use open built-in method with or without "r" mode as a second arguments.

Program Code

    finput = open("lola.txt")
    print finput
    data = finput.read()
    print data
   

Output

<open file 'none.txt', mode 'r' at 0x00B34440>
Welcome to Python world. Python is a nice language. It's fun to learn. And it's easy to use.

In the above code, we open file accesss using open built in method and supply its argument with filename. Then we use read method to read all the contents of the file, and save it in variable data.

Writing To A File

For writing to a file, you also use built in open method with the mode "w". For example

Program Code

    foutput = open("lola.txt", "w")
    foutput.write("Hello From Python.")
    foutput.write("We love to do what the best.")
    foutput.close()   

When you write a file in Python, you need to end your code with close method so the buffer will be flushed.

Python - Dictionary

2011-05-08T23:08:00.008+07:00

Introduction

Python dictionary data structure is like a map in another language like java or associative array in php. It's use a name value pairs.

How To

You use bracket for declaring and defining it. Here's a code.

Program Code

     data = {"name":"lady gaga", "city":"new york", "age":24}
     print data    

Output

{"name":"lady gaga", "city":"new york", "age":24}

Accessing And Modifying Element

For accessing a value, you use its name. For example, you want to access name value, so you use its name key.

Program Code

    data = {"name":"lady gaga", "city":"new york", "age":24}
    print "Name: ", data["name"]
    print "City: ", data["city"]
    print "Age: ", data["age"]
   

Output

Name: lady gaga
City: new york
Age: 24

You can also change the value of a map. If you want to change, use the key. Here, for example, we want to change the name to be "jenifer lopez"

Program Code

     data = {"name":"lady gaga", "city":"new york", "age":24}
     data["name"] = "jenifer lopez"
     print data    

Output

{"city":"new york", "name":"jenifer lopez", "age":24}

Iterating Elements

Here's a code that just iterate for the keys

Program Code

     data = {"name":"lady gaga", "city":"new york", "age":24}     for item in data:         print item    

Output

city
age
name

May you ask, why just the keys? I don't know how to answer the reason, but it's not so bad bacause we just can get the keys - we can get the values by the keys.

Program Code

     data = {"name":"lady gaga", "city":"new york", "age":24}
     for key in data:
         print data[key]    

From the above you see that the append() method will add a new element to the last one. "selena holmes" added to the list.

Removing an element

For removing an element, you need to know an element you want to remove. Here's the code

Program Code

    names = ["lady gaga", "barack obama", "selena holmes"]
    print names    names.remove("barack obama")
    print names   

Output

["lady gaga", "barack obama", "selena holmes"]
["lady gaga", "selena holmes"]

You see that there's nothing the name for "barack obama".

Slicing

Slicing is one of the most usefule feature of list. Slicing means that when you just need some data you can do it with less of the code.

Program Code

    ages = [10, 20, 30, 40, 50]
    print ages
    print "exclude the first one: ", ages[1:]
    print "exclude the first three: ", ages[3:]
    print "just the first one: ", ages[:1]
    print "just from 1st till less than 3rd: ", ages[1:3]
   

Output

[10, 20, 30, 40, 50]
exclude the first one: [20, 30, 40, 50]
exclude the first three: [40, 50]
just the first one: [10]
just from 1st till less than 3rd: [20, 30]

Keep in mind that the slicing index started from zero. It need sometime to understand this one, but when you have master it, you can make manuver.

For Statement In List

It's very easy to iterate all elements in a list using for. Try this code.

Program Code

    fruits = ["apple", "melon", "orange", "banana"]
    for item in fruits:
        print item   

Output

apple
melon
orange
banana

If Statement In List

If statement can be also to test whether a list contain specified element of not.

Program Code

     names = ["lady gaga", "madonna", "selena holmes", "avril"]
     if "shakira" in names:
         print "Okey, \"shakira\" existed on names list"
     else:
          print "Noop, \"shakira\" doesn't exists on names list"    

Output

Noop, "shakira" doesn't exists on names list

C - Define

2011-05-04T01:42:00.001+07:00

#define MODULE_AUTHOR(auth) printf("Author: %s\n",auth)
#define MODULE_DESCRIPTION(desc) printf("Description: %s\n", desc)

MODULE_AUTHOR("Irfanudin Ridho");
MODULE_DESCRIPTION("File System");

C - String Memory Handling

2011-05-03T21:27:00.000+07:00

1. memcpy

char name[] = "lady gaga and barack obama";

char data[100];

memcpy(data, name, strlen(name)+1);

puts(data);

2. memset

char name[] = "lady gaga";

memset(name, '*', 5);

puts(name);

3. memmove

char name[] = "lady gaga and luna maya";

memmove(name+0, name+5, 4); // placed, starting, num

puts(name);

C - Iterate Pointer Of Char

2011-05-03T20:59:00.001+07:00

To iterate a pointer of char, it's just need like doing with custom looping

char *data = "lady gaga";

for(; *data!='\0'; data++){

    putchar(*data);

}

Or using this one:

while(*data != '\0'){
putchar(*data);
data++;
}

C - Malloc And Calloc

2011-05-03T20:49:00.000+07:00

When we use malloc? We use it when we have a pointer, and we want to initialize it.

char name[] = "lady gaga";

char *ptr;

ptr = (char*) malloc(sizeof(name) * sizeof(char))

And then it's okey to initialize it through assignment or strcpy

ptr = name;

or

strcpy(ptr, name);

Calloc is same as malloc:

ptr = (char*) calloc(sizeof(name), sizeof(char))

When you need copy an array of char to an array of char, the one way is use strcpy function

char name[] = "Indonesia";

char data[100];

strcpy(data, name);

Python - Class and Static Methods

2011-05-03T04:16:00.000+07:00

class Advanced(object):
    def __init__(self, name):
        self.name = name
    def Description():
        return 'This is an advanced class.'
    def ClassDescription(cls):
        return 'This is advanced class: %s' % repr(cls)
    Description = staticmethod(Description)
    ClassDescription = classmethod(ClassDescription)

obj1 = Advanced('Nectarine')
print obj1.Description()
print obj1.ClassDescription()
print '=' * 30
print Advanced.Description()
print  Advanced.ClassDescription()

This is an advanced class.
This is advanced class: <class __main__.Advanced at 0x401c926c>
==============================
This is an advanced class.
This is advanced class: <class __main__.Advanced at 0x401c926c>

Python - Static Data

2011-05-03T04:08:00.000+07:00

>> class One:

...    age = 45

...    def inc(self):

...        One.age = One.age + 1

...    def get(self):

...        return One.age

...

>> a = One()

>> b = One()

>> a.inc()

>> b.get()

>> a.inc()

>> b.get()

Python - Pipe

2011-05-03T03:26:00.000+07:00

>> import os

>> cmd = "dir"

>> fp = popen(cmd)

>> print fp.read()
>> fp.close()

Python - anydbm Module

2011-05-03T03:21:00.002+07:00

>> import anydbm

>> db = anydbm.open("data.db","c")

>> db["lady"] = "Gaga"

>> db["luna"] = "Maya"

>> print db["lady"]

Mics - ub IP List

2011-05-03T00:30:00.003+07:00

('dudde.ub.ac.id', '175.45.184.100')
('DI-PPTI', '175.45.184.101')
('mail.ub.ac.id', '175.45.184.111')
('simpeg.ub.ac.id', '175.45.184.116')
('hostingdosen.ub.ac.id', '175.45.184.118')
('external-gw.ub.ac.id', '175.45.184.129')
('internal-gw.ub.ac.id', '175.45.184.130')
('dmz-gw.ub.ac.id', '175.45.184.131')
('collo-gw.ub.ac.id', '175.45.184.132')
('inherent-gw.ub.ac.id', '175.45.184.138')
('proxy.ub.ac.id', '175.45.184.162')
('radius.ub.ac.id', '175.45.184.163')
('ns1.ub.ac.id', '175.45.184.164')
('ns2.ub.ac.id', '175.45.184.165')
('central-sw.ub.ac.id', '175.45.184.167')
('proxy2.ub.ac.id', '175.45.184.168')
('ldap.ub.ac.id', '175.45.184.170')
('lpse.ub.ac.id', '175.45.184.51')
('lpse-lat.ub.ac.id', '175.45.184.52')
('smtp-lpse.ub.ac.id', '175.45.184.55')
('simak-db.ub.ac.id', '175.45.184.57')
('siam-sv1.ub.ac.id', '175.45.184.58')
('esxi4.ub.ac.id', '175.45.184.59')
('blog.ub.ac.id', '175.45.184.60')
('devel-gw.ub.ac.id', '175.45.184.66')
('bais.ub.ac.id', '175.45.184.67')
('netmon.ub.ac.id', '175.45.184.68')
('www.ub.ac.id', '175.45.184.70')
('mail.ub.ac.id', '175.45.184.71')
('students-mail.ub.ac.id', '175.45.184.72')
('ftp.ub.ac.id', '175.45.184.73')
('ws.ub.ac.id', '175.45.184.75')
('siakad.ub.ac.id', '175.45.184.76')
('bridgedb.ub.ac.id', '175.45.184.77')
('siakad-db.ub.ac.id', '175.45.184.78')
('keudb.ub.ac.id', '175.45.184.79')
('sikeu.ub.ac.id', '175.45.184.80')
('smtp-gw.ub.ac.id', '175.45.184.81')
('lists.ub.ac.id', '175.45.184.82')
('inherent.ub.ac.id', '175.45.184.83')
('lecture.ub.ac.id', '175.45.184.85')
('siam.ub.ac.id', '175.45.184.86')
('hosting2.ub.ac.id', '175.45.184.87')
('hvm1.ub.ac.id', '175.45.184.89')
('selma.ub.ac.id', '175.45.184.90')
('hosting.ub.ac.id', '175.45.184.92')

C++ - Building Manipulator

2011-05-03T00:16:00.000+07:00

ostream &sep(ostream &stream){
stream << '\t';
return stream;
}

C++ - Manipulaltion Output

2011-05-02T21:53:00.002+07:00

    cout << "Table" << endl;
    cout << setw(15) << setiosflags(ios::left) << "Name";
    cout << setw(15) << setiosflags(ios::left) << "City";
    cout << setw(10) << setiosflags(ios::left) << "Age" << endl;

    string names[] = {"lady gaga","luna maya","aura kasih","barack obama"};
    string cities[] = {"new york","denpasar","jakarta","white house"};
    int ages[] = {24, 27, 25, 50};
    cout << "===================================" << endl;
    for(int i=0;i<4;i++){
        cout << setw(15) << setiosflags(ios::left) << names[i];
        cout << setw(15) << setiosflags(ios::left) << cities[i];
        cout << setw(10) << setiosflags(ios::left) << ages[i] << endl;
    }

Python - Build Web Client

2011-05-02T05:13:00.000+07:00

This is a small code for emulating on how to a web client connect to server:

file: client.py
import socket

HOST = 'localhost'
PORT = 6003
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client.connect((HOST, PORT))

# request line
http_data = 'GET /index.php HTTP/1.1\n'

# header line - all are optional but Host
http_data = http_data + 'Host: localhost:80\n' # required
http_data = http_data + 'From: irfan.ub@gmail.com\n'
http_data = http_data + 'User-Agent: Lucia Browser\n'
http_data = http_data + 'Keep-Alive: 10\n'
http_data = http_data + 'Accept: text/html\n'
http_data = http_data + 'Connection: close\n'

# separation line - required
http_data = http_data + '\n' # required

client.send(http_data)

data = client.recv(1024*5)
client.close()
print 'Received\n=================\n', data

The response header is like this:
Received
=================
HTTP/1.1 200 OK
Date: Sun, 01 May 2011 22:19:28 GMT
Server: Apache/2.2.14 (Win32) DAV/2 mod_ssl/2.2.14 OpenSSL/0.9.8l mod_autoindex_
color PHP/5.3.1 mod_apreq2-20090110/2.7.1 mod_perl/2.0.4 Perl/v5.10.1
X-Powered-By: PHP/5.3.1
Set-Cookie: PHPSESSID=ajunliavga128hlvcou4chigv6; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-Length: 114
Connection: close
Content-Type: text/html

<form action="test.php" method="post">
<input type="text" name="text"/> Holla</form>
<a href="test.php">Test</a>

Python - Bulding Web Server

2011-05-02T05:09:00.000+07:00

Here's a short code on how to build workable web server:

name: server.py

import socket

HOST = ''
PORT = 6003

server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.bind((HOST, PORT))
server.listen(2)
conn, addr = server.accept()

print 'Connected by', addr

# initial lines
data = 'HTTP/1.0 404 Not Found\n'

# header lines - all are optional
data = data + 'Date: Fri, 31 Dec 2011 10:12:13 GMT\n'
data = data + 'Content-Type: text/html\n'
data = data + 'Content-Length: 22\n'
data = data + 'Server: Lucia Web Server\n'

# separating lines. needed
data = data + '\n'

# body
data = data + '<html><head><title>Hello World</title></head><body>'
data = data + '<h1>hello World</h1></body></html>'

# receiving the request headers from browser
datas = conn.recv(1024)
print datas

# send the response header plus the body
conn.send(data)
conn.close()

These the request header of the browser:

GET /index.html HTTP/1.1
Host: localhost:6003
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.17) Gecko/2
0110420 SVD Firefox/3.6.17
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Connection: keep-alive

Accessed from telnet
>>telnet
telnet>> open localhost 6003 HTTP/1.0 /index.hmtl

C - Default Function

2011-04-28T02:29:00.000+07:00

#include <stdio.h>
#include <stdlib.h>

typedef struct{
    char *name;
    char *city;
    int age;
}data;

int addName(data *d){
    d->name = "lady gaga";

    return 0;
}

int addCity(data *d){
    d->city = "new york";

    return 0;
}

int addAge(data *d){
    d->age = 24;

    return 0;
}

int set_default(data *d){

    addName(d);
    addCity(d);
    addAge(d);

    return 0;
}

char* getName(data *d){
    return d->name;
}

char* getCity(data* d){
    return d->city;
}

int getAge(data* d){
    return d->age;
}

int changeName(data* d, const char* name){
    d->name = (char *)malloc(1*sizeof(char));
    strcpy(d->name, name);

    return 0;
}

int changeCity(data* d, const char* city){
    d->city = (char *) malloc(1*sizeof(char));
    strcpy(d->city, city);

    return 0;
}

int changeAge(data* d, int age){
    d->age = age;

    return 0;
}

int main(int c){
    system("color 5f");

    data* list;
    list = (data*) malloc(10*sizeof(data));

    set_default(list);



    printf("%s, %d of %s",getName(list), getAge(list), getCity(list));

    return 0;
}

C - Member Using DMA

2011-04-28T02:24:00.000+07:00

#include <stdio.h>
#include <stdlib.h>

typedef struct{
    char *name;
    char *city;
    int age;
}data;

int addName(data *d){
    d->name = "lady gaga";

    return 0;
}

int addCity(data *d){
    d->city = "new york";

    return 0;
}

int addAge(data *d){
    d->age = 24;

    return 0;
}

char* getName(data *d){
    return d->name;
}

char* getCity(data* d){
    return d->city;
}
int getAge(data* d){
    return d->age;
}

int changeName(data* d, const char* name){
    d->name = (char *)malloc(1*sizeof(char));
    strcpy(d->name, name);

    return 0;
}

int changeCity(data* d, const char* city){
    d->city = (char *) malloc(1*sizeof(char));
    strcpy(d->city, city);

    return 0;
}

int changeAge(data* d, int age){
    d->age = age;

    return 0;
}

int main(int c){
    system("color 5f");

    data* list;
    list = (data*) malloc(10*sizeof(data));

    addName(list);
    addCity(list);
    addAge(list);

    changeName(list, "Luna Maya");
    changeCity(list, "Denpasar");
    changeAge(list, 27);

    printf("%s, %d of %s",getName(list), getAge(list), getCity(list));

    return 0;
}

C - Complete Pointer And Struct

2011-04-28T02:14:00.002+07:00

#include <stdio.h>
#include <stdlib.h>

typedef struct{
    char *name;
    char *city;
    int age;
}data;
int addName(data *d){
    d->name = "lady gaga";

    return 0;
}
int addCity(data *d){
    d->city = "new york";

    return 0;
}
int addAge(data *d){
    d->age = 24;

    return 0;
}
char* getName(data *d){
    return d->name;
}
char* getCity(data* d){
    return d->city;
}
int getAge(data* d){
    return d->age;
}
int main(int c){
    system("color 5f");

    data* list;
    list = (data*) malloc(1*sizeof(data));
    addName(list);
    addCity(list);
    addAge(list);
    printf("%s, %d of %s",getName(list), getAge(list), getCity(list));

    return 0;
}

C - Pointer Behind Struct

2011-04-28T02:09:00.002+07:00

#include <stdio.h>
#include <stdlib.h>

typedef struct{
    char *name;
    char *city;
    int age;
}data;

int addName(data *d){
    d->name = "lady gaga";

    return 0;
}

int addCity(data *d){
    d->city = "new york";

    return 0;
}

int addAge(data *d){
    d->age = 24;

    return 0;
}

int main(int c){
    system("color 5f");

    data* list;
    list = (data*) malloc(1*sizeof(data));

    addName(list);
    addCity(list);
    addAge(list);

    printf("%s, %d of %s",list->name, list->age, list->city);

    return 0;
}

C - The Reaon Behind Pointer

2011-04-28T02:01:00.002+07:00

1. Pure of array
========================

#include <stdio.h>
#include <stdlib.h>

int setFirst(char n[]){

    n[0] = 'l';
    n[1] = 'a';
    n[2] = 'd';
    n[3] = 'y';

    return 0;
}

int setSecond(char n[]){
    n[4] = ' ';
    n[5] = 'g';
    n[6] = 'a';
    n[7] = 'g';
    n[8] = 'a';
    n[9] = '\0';

    return 0;
}

int main(int c){

    system("color 5f");

    char name[10];

    setFirst(name);
    setSecond(name);

    printf("%s",name);

    return 0;
}

2. Using pointer and dma
==============================
#include <stdio.h>
#include <stdlib.h>

int setFirst(char n[]){

    n[0] = 'l';
    n[1] = 'a';
    n[2] = 'd';
    n[3] = 'y';

    return 0;
}

int setSecond(char n[]){

    n[4] = ' ';
    n[5] = 'g';
    n[6] = 'a';
    n[7] = 'g';
    n[8] = 'a';
    n[9] = '\0';

    return 0;
}

int main(int c){

    system("color 5f");

    char* name;
    name = (char *)malloc(1*sizeof(char));

    setFirst(name);
    setSecond(name);

    printf("%s",name);

    return 0;
}

3. argument pointer
=======================
#include <stdio.h>
#include <stdlib.h>

int setFirst(char *n){

    n[0] = 'l';
    n[1] = 'a';
    n[2] = 'd';
    n[3] = 'y';

    return 0;
}

int setSecond(char n[]){
    n[4] = ' ';
    n[5] = 'g';
    n[6] = 'a';
    n[7] = 'g';
    n[8] = 'a';
    n[9] = '\0';

    return 0;
}

int main(int c){
    system("color 5f");

    char* name;
    name = (char *)malloc(1*sizeof(char));

    setFirst(name);
    setSecond(name);

    printf("%s",name);

    return 0;
}

4. Use strcpy and strcat
========================
#include <stdio.h>
#include <stdlib.h>

int setFirst(char *n){

    const char* name = "lady";
    strcpy(n, name);

    return 0;
}

int setSecond(char n[]){

    const char* name = " gaga";
    strcat(n, name);

    return 0;
}

int main(int c){

    system("color 5f");

    char* name;
    name = (char *)malloc(1*sizeof(char));

    setFirst(name);
    setSecond(name);

    printf("%s",name);

    return 0;
}

Python - Web Server

2011-04-27T03:05:00.001+07:00

There's some options to build a web server using Python:
1. Using BaseHTTPServer

from BaseHTTPServer import *

def run(server_class=BaseHTTPServer.HTTPServer,

    handler_class=BaseHTTPServer.BaseHTTPRequestHandler):

    server_address = ("", 8000)

    httpd = server_class(server_address, handler_class)

    httpd.server_forever()

run()

2. Using SimplerHTTPServer

import SimpleHTTPServer

import SocketServer

PORT = 8001

Handler = SimpleHTTPServer.SimpleHTTPRequestHandler

httpd = SockerServer.TCPServer(("", PORT), Handler)

print "Serving at port: ', PORT

httpd.serve_forever()

Or you can invoke it using

python.exe -m SimpleHTTPServer 8000

Java - Packaging

2011-04-20T22:44:00.001+07:00

The firstly build the nice directory, for example:

C:\project

    |- bin

    |- src

        |- com

            |- lucia

|- Boo.java

Then compile your java file using:
C:\project javac -d bin src\com\lucia\Boo.java

The above command will make a binary class file inside your bin directory plus the package.

C:\project> javac -d bin -sourcepath src src\com\lucia\Main.java

C:\project> java -cp bin com.lucia.Main
See more on: http://www.ibm.com/developerworks/library/j-classpath-windows/

Django - Login Logout

2011-04-19T00:55:00.000+07:00

# views.py 

def login(request):
    login = None
    if request.user.is_authenticated(): # check if user has login
        login = True
    else:
        login = False
    return render_to_response('polls/login.html', {'title': 'Login Logout Page', 'login':login})

def loginprocess(request):
    from django.contrib.auth import authenticate, login, logout
    from django.http import HttpResponseRedirect

    username = request.POST['username']
    password = request.POST['password']
    user = authenticate(username=username, password=password)

    if user is not None:
        if user.is_active:
            login(request, user)  # login script
            return HttpResponseRedirect('http://localhost:8000/login')
        else:
            return render_to_response('polls/login.html', {'title': 'Disabled Account'})
    else:
        return render_to_response('polls/login.html', {'title': 'Not Registered Account'})
       

def logout(request):
    from django.contrib.auth import logout
    from django.http import HttpResponseRedirect

    logout(request)
    return HttpResponseRedirect('http://localhost:8000')

Django - Redirection

2011-04-18T23:34:00.000+07:00

This is a simple example of redirection mechanism in Django.

from django.http import HttpResponseRedirect

def my_view(request):

return HttpResponseRedirect('http://google.com')

Zend - Paginator

2011-04-18T00:22:00.000+07:00

<?php

$request = $this->getRequest();
$page = $request->getParam('page');
if(!isset($page) || $page<1) $page=1;

$registry = Zend_Registry::getInstance();

$db = $registry['db'];
$result = $db->fetchAll("SELECT * FROM data");

// the core paginator
$paginator = Zend_Paginator::factory($result);
$paginator->setItemCountPerPage(10);
$paginator->setCurrentPageNumber($page);
$this->view->paginator = $paginator;

if($page==1){
$this->view->previous = $page;
}else{
$this->view->previous = $page-1;
}

$this->view->next = $page+1;

?>

Then on your view, use:

<?php include "header.phtml";?>
<?php
    $output = '<ul>';
    foreach($this->paginator as $row){
        $output .= '<li>'.$row['id'].' '.$row['name'].' '.$row['city'].' '.$row['age'].'</li>';
    }
    echo $output.'</ul>';
?>
<a href="<?php echo $this->baseUrl();?>/index/front/page/5">5</a> |
<a href="<?php echo $this->baseUrl();?>/index/front/page/<?php echo $this->next;?>">Next</a> |
<a href="<?php echo $this->baseUrl();?>/index/front/page/<?php echo $this->previous;?>">Previous</a>
<?php include "footer.phtml";?>

Apache - Removing index.php

2011-04-17T00:30:00.000+07:00

For removing index.php on url, type this code to an .htaccess file:

RewriteEngine On

RewriteRule ^[a-z]/* index.php

The process the script in the file of index.php

<?php

    // you can process the url use this one
    $q = $_SERVER['REQUEST_URI'];

    $queries = explode('/',$q);

    $page = $queries[1];

    if($page == 'css'){
        include "css/index.php";
    }else if($page == 'js'){
        include "js/index.php";
    }else if($page == 'hello'){
        include ("hello.php");
    }else{
        include "404.php";
    }
?>

Apache - Building Pretty URL

2011-04-16T23:47:00.000+07:00

<?php
   $q = $_SERVER['REQUEST_URI'];
   $queries = explode('/',$q); // the url: /index.php/hello/somevalue/somevalue
   var_dump($queries);
   $page = $queries[2];
   $value1 = $queries[3];
   $value2 = $queries[4];
   if($page == 'holla'){
       include "holla.php";
   }else if($page == 'hello'){
       include "hello.php";
   }else if($page == '' && $queries[1] = 'index.php'){
       include "front.php";
   }else{
       include "404.php";
   }
?>

And the htaccess file is like this one:
RewriteEngine On
RewriteCond %{SCRIPT_FILENAME} !-d
RewriteCond %{SCRIPT_FILENAME} !-f
RewriteRule .* index.php [L]

Apache - Safe URL

2011-04-16T23:05:00.000+07:00

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L,QSA]

The above .htaccess file, will direct whatever the url that no available in the server to catch.php file

Django - Custom Response

2011-04-16T05:30:00.000+07:00

HttpResponse is the basic for manipulating response to client.
For displaying an xml file, use

response = HttpResponse(mimetype="text/xml")

response.write('<?xml version="1.0"?>')

response.write('<data>No Data</data>')

return response

For displaying image, use

im = Image.open("nature.png")   # use PIL library

response = HttpResponse(mimetype="image/png")

im.save(response, "PNG")

return response

Zend - SOAP Web Service

2011-04-16T03:54:00.001+07:00

Below is a three file:
1. mywebservie.php - defining class that used in this web service
2. webservice.php - WSDL document and Soap server creation
3. hello.php - a client that request a service from the soap server
You can find nice guide here: http://www.phpriot.com/articles/zend-soap/6

1. mywebservice.php
<?php

/**
* Web service methods
*/
class MyWebService
{
    /**
    * Get the server date and time
    *
    * @return string
    */
    public function getDate()
    {
        return date('c');
    }

    /**
    * Get a nicely formatted string of a person's age
    *
    * @param string $name The name of a person
    * @param int $age The age of a person
    * @return string
    */
    public function getAgeString($name, $age)
    {
        return sprintf('%s is %d years old', $name, $age);
    }
}

?>

2. webservice.php
<?php

require_once "mywebservice.php";

if(strcmp($_SERVER['QUERY_STRING'],'wsdl') == 0){
    // WSDL Document creation
    require_once "Zend/Soap/AutoDiscover.php";
    $auto = new Zend_Soap_AutoDiscover();
    $auto->setClass('MyWebService');
    $auto->handle();
}else{
    // SOAP Document creation
    require_once "Zend/Soap/Server.php";

    $soapServer = new Zend_Soap_Server("http://localhost/webservice.php?wsdl");
    $soapServer->setClass('MyWebService');
    $soapServer->handle();
}
?>

3. hello.php
================
<?php

require_once "Zend/Soap/Client.php";

$url = "http://localhost/hello.php?wsdl";

$client = new Zend_Soap_Client($url);

echo sprintf("Server Timestamp: %s", $client->getDate());
echo '<br/>';
echo $client->getAgeString('Lady Gaga', 24);
?>

Zend - Consuming Web Service

2011-04-16T03:49:00.001+07:00

Here's a code on how to consume a web service from a SOAP server. read more one http://www.phpriot.com/articles/zend-soap/6

file: hello.php

<?php

require_once "Zend/Soap/Client.php";

$client = new Zend_Soap_Client("http://localhost/webservice.php?wsdl");

echo $client->getDate();

echo $client->getAgeString('Lady Gaga', 24);

Zend - Creating SOAP Server

2011-04-16T03:45:00.002+07:00

After you create and define your custom class and the corrisponding WSDL document, now you can create SOAP server. Read more on http://www.phpriot.com/articles/zend-soap/6

file: webservice.php

<?php

require_once 'mywebservice.php';

if($_SERVER['QUERY_STRING'] == 'wsdl'){

    // WSDL document creation

}else{

   // SOAP Server creation

   require_once "Zend/Soap/Server.php";

    $soapServer = new Zend_Soap_Server("http://localhost/webservice.php?wsdl");

    $soapServer->setClass('MyWebService');

    $soapServer->handle();

}

Zend - Creating WSDL Document

2011-04-16T03:06:00.002+07:00

To create a WSDL document using Zend, you need to make a common class in a php file. For example
file: mywebservice.php
<?php

/**
* Web service methods
*/
class MyWebService
{
    /**
    * Get the server date and time
    *
    * @return string
    */
    public function getDate()
    {
        return date('c');
    }

    /**
    * Get a nicely formatted string of a person's age
    *
    * @param string $name The name of a person
    * @param int $age The age of a person
    * @return string
    */
    public function getAgeString($name, $age)
    {
        return sprintf('%s is %d years old', $name, $age);
    }
}

?>

Then create another php file, webservice.php
<?php

require_once "mywebservice.php";
require_once "Zend/Soap/AutoDiscover.php";

$auto = new Zend_Soap_AutoDiscover();
$auto->setClass('MyWebService');
$auto->handle();
?>

Then now, point out your browser to http://localhost/webservice.php - you will get an WSDL document. Read more on: http://www.phpriot.com/articles/zend-soap/6

PHP - The First Web Services

2011-04-16T02:03:00.000+07:00

This is my first web service I try to do that successfully executed:
index.php

<?php

require_once "nusoap.php";

$server = new soap_server;

$server->register('hello');

function hello($name){

    return 'Hello, '.$name.' From Soap Server';

}

$HTTP_RAW_POST_DATA = isset($HTTP_RAW_POST_DATA) ? $HTTP_RAW_POST_DATA : '';

$server->service($HTTP_RAW_POST_DATA);

?>

While the client code is:

<?php

require_once 'nusoap.php';

$client = new SoapClient(

    null,

    array(

        'location' => 'http://localhost/index.php',

        'uri' => 'http://localhost:80',

        'soap_version' => '0.9.5',

)

);

$result = $client->hello('Barack Obama');

print_r($result);

XML - Creating XSL File

2011-04-15T23:58:00.000+07:00

For linking an xml file with its stylesheet file, add a line of code:

<xsl-stylesheet type="text/xsl" href="main.xsl">

Then defining your xsl file by

<?xml version="1.0">

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

<data>

    <item>

...

    </item>

</data>

Zend - Validation

2011-04-15T05:00:00.000+07:00

To validate an input, use Zend_Validate class and an implementation of the class that use it:

require_once "Zend/Validate.php";

require_once "Zend/Validate/StringLength.php";

$validator = new Zend_Validate_StringLength(5);

$input = "Coming Here";

if($validator->isValid($input)){

     // success code

}else{

     // error code

     echo current($validator->getMessages());

}

Zend - Log

2011-04-15T04:41:00.000+07:00

To write a log, include two file of Zend:

require_once "Zend/Log.php";

require_once "Zend/Log/Writer/Stream.php";

$logger = new Zend_Log();

$writer = new Zend_Log_Writer_Stream("log.txt");

$logger->addWriter($writer);

$logger->log('Informational formation', Zend_Log::INFO);

$logger->info('Infor message');

Zend - Feed

2011-04-15T03:52:00.001+07:00

<?php

require_once "Zend/Controller/Action.php";
require_once "Zend/Feed.php";

class IndexController extends Zend_Controller_Action{

    public function indexAction(){
        $this->_redirect('index/front');
    }
    public function frontAction(){
        $feed = Zend_Feed::import('http://images.apple.com/main/rss/hotnews/hotnews.rss');

        $output = '<h1>Title: '.$feed->title().'</h1>';
        $output .= '<h2>Link: '.$feed->link().'</h2>';
        $output .= '<h3>Description: '.$feed->description().'</h3>';
        
        foreach($feed as $item){
            $output .= '<div>';
            $output .= '<h2><a href="'.$item->link().'">'.$item->title().'</a></h2>';
            $output .= '<div>'.$item->description().'</div>';
            $output .= '</div>';
        }

        echo $output;

       // print xml document
       print $feed->saveXML();
    }

}

Zend - Example For Using Lucene

2011-04-15T02:26:00.003+07:00

<?php

require_once "Zend/Controller/Action.php";
require_once "Zend/Search/Lucene.php";


class IndexController extends Zend_Controller_Action{

    public function indexAction(){
        $this->_redirect('index/front');
    }

    public function frontAction(){
        $index = new Zend_Search_Lucene('lola', true);
        
        $doc = new Zend_Search_Lucene_Document();
        
        $contents = array(
            'Google is greate one for our company. so when we are ready to make it, please make some time to be user for you',
            'Apple is another sompany for using with some simple of the example for this one.',
            'Microsoft is another one for the coming of the yeras for this one. It has windows',
        );
        $titles = array(
            'Google is technology company mobile',
            'Apple is mobile leader company',
            'Microsoft is king for desktop',
        );
        $links = array(
            'http://google.com',
            'http://apple.com',
            'http://microsoft.com',
        );
        
        for($i=0; $i<count($links); $i++){
            $doc->addField(Zend_Search_Lucene_Field::Keyword('link', $links[$i]));
            $doc->addField(Zend_Search_Lucene_Field::Text('title', $titles[$i]));
            $doc->addField(Zend_Search_Lucene_Field::Unstored('contents', $contents[$i]));
            $index->addDocument($doc);
        }
        
        
        $index->commit();
        echo $index->count()." Documents indexed";

    }
    
    
    public function renderAction(){
    
        $request = $this->getRequest();
        $query = $request->getParam('query');
        
        $index = new Zend_Search_Lucene('lola');
        $hits = $index->find($query);
        
        $output = '<div id="search">';
        
        $output .= '<p>Total Index: '.$index->count().' documents</p>';
        $output .= '<p>Search For: '.$query.' has resulted on '.count($hits).'</p>';
        foreach($hits as $hit){
            $output .= '<div id="item">';
            $output .= '<h2><a href="'.$hit->link.'">'.$hit->title.'</a> '.$hit->score.'</h2>';
            $output .= '</div>';
        }
        $output .= '</div>';
        
        echo $output;
    }    

}

// see more: http://devzone.zend.com/article/91 

Zend - Lucene Search

2011-04-15T02:25:00.000+07:00

To create a search application using Zend, you use lucene class:

<?php

require_once "Zend/Search/Lucene.php";

$index = new Zend_Search_Lucene('lola', true);
The above code will create a directory folder for search index. There are five files for it:
1. read.lock.file
2. write.lock.file
3. segments_1
4. segments_2
5. segments_gen

$doc->addField(Zend_Search_Lucene_Field::Keyword('link', '<a href="#">Boo</a>'));
$doc->addField(Zend_Search_Lucene_Field::Text('title', 'Hello World'));
$doc->addField(Zend_Search_Lucene_Field::Unstored('contents', 'This is description'));
$index->addDocument($doc);
$index->commit();
echo $index->count()." Documents indexed";

For displaying the result:

$index = new Zend_Search_Lucene('lola');
$query = 'World';
$hits = $index->find($query);
echo "Index contains: ".$index->count()." documents.<br/>";
        echo "Search for: \"".$query."\" returned \"".count($hits)."\" hits";
foreach($hits as $hit){
     echo "<ul>";
     echo "<li>".$hit->link."</li>";
   echo "<li>".$hit->title."</li>";
     echo "<li>".$hit->score."</li>";
      echo "</ul>";
}

Zend - Linking CSS File

2011-04-10T23:55:00.000+07:00

You can use either one of this below in your view file:

<?php
    $this->headLink()->appendStylesheet($this->baseUrl().'/css/style.css');
    echo $this->headLink();
?>

Or just use:
<link rel="stylesheet" href="<?php echo $this->baseUrl();?>/css/style.css"/>

Zend - .htaccess

2011-04-10T23:42:00.002+07:00

RewriteEngine On
RewriteRule .* index.php

Instead of using the above .htaccess file, use this below one:

RewriteEngine On

RewriteCond $1 !^(index\.php|img/*|js/*|css/*)

RewriteRule ^(.*)$ index.php/$1 [L]

Zend - Built In Helpers

2011-04-10T22:55:00.000+07:00

Helper is a function that you call from views.

1. Button Helpers

<?php

    $attr = array(

        'style' => 'background: yellow; border: 1px solid #ccc;', 

);

    echo $this->formButton('init', 'Init', $attr);

Zend - Zend Helper

2011-04-10T21:41:00.000+07:00

File: application/views/helpers/HelloHelper.php

<?php

require_once 'Zend/View/Helper/Abstract.php';

class Zend_View_Helper_HelloHelper extends Zend_View_Helper_Abstract{

    function helloHelper(){

        return 'Hello Comes From Helper';

}

}

?>

Then in the views file, call it using:
<?php echo $this->helloHelper();?>

Zend - Authentication

2011-04-10T04:35:00.002+07:00

    public function authAction(){
        $request = $this->getRequest();
        $registry = Zend_Registry::getInstance();
        $auth = Zend_Auth::getInstance();
        
        $db = $registry['db'];
        
        $authAdapter = new Zend_Auth_Adapter_DbTable($db);
        $authAdapter->setTableName('users')
                    ->setIdentityColumn('username')
                    ->setCredentialColumn('password');
                    
        // set the input credential values
        $uname = $request->getParam('username');
        $passwd = $request->getParam('password');
        $authAdapter->setIdentity($uname);
        $authAdapter->setCredential(md5($passwd));
        
        // perform the auth query, saving the result
        $result = $auth->authenticate($authAdapter);
        
        if($result->isValid()){
            $data = $authAdapter->getResultRowObject(null, 'passwd');
            $auth->getStorage()->write($data);
            $this->_redirect('/user/userpage');
        }else{
            $this->_redirect('/user/loginform');
        }
    }
    
    public function userpageAction(){
        $auth = Zend_Auth::getInstance();
        
        if(!$auth->hasIdentity()){
            $this->_redirect('/user/loginform');
        }
        
        $request = $this->getRequest();
        $user = $auth->getIdentity();
        $real_name = $user->real_name;
        $username = $user->username;
        $url = $request->getBaseURL().'/user/logout';
        
        $this->view->assign('username', $real_name);
        $this->view->assign('url', $url);
        
    }
    
    public function logoutAction(){
        $auth = Zend_Auth::getInstance();
        $auth->clearIdentity();
        $this->_redirect('/user');
    }

Zend - Database Style

2011-04-10T02:14:00.001+07:00

$db = new Zend_Db_Adapter_Pdo_Mysql($params)

To update data, do like

$data = array(

    'name' => 'Lady Gaga',

    'city' => 'New York',

);

$db->update('user_table', $data, 'id = 1');

For insert data, do like

$data = array(

    'name' => 'Lady Gaga',

    'city' => 'New York',

    'age' => 24

);

$db->insert('user_table', $data);

For deleting data, use

$db->delete('user', 'id = '.$id);

For querying table, use:

$result = $db->fetchRow('SELECT * FROM user_table WHERE id=1');

echo $result['first_name'];

echo $result['last_name'];

$result = $db->fetchAssoc('SELECT * FROM user_table');

for($i=0; $i<count($result); $i++){

     echo $result[$i]['first_name'];

     echo $result[$i]['last_name'];

}

Zend - Inserting Data To Database

2011-04-10T01:23:00.000+07:00

user require_once to include

Zend/Db/Adapter/Pdo/Mysql.php

Then use this code on function

$params = array(

    'host' => 'localhost',

    'username' => 'root',

    'password' => 'pass',

    'dbname' => 'zend',

);

$db = new Zend_Db_Adapter_Pdo_Mysql($params);

$data = array(

    'name' => 'Lady Gaga',

    'city' => 'New York',

    'age' => 45,

);

$db->insert('table', $data);

$result = $db->fetchAssoc('SELECT * FROM table');

Zend - Folder Structures

2011-04-10T01:18:00.000+07:00

The folder structure is:

htdocs

    - hello

        - application

            - controllers

            - models

            - views

                - filters

                - helpers

                - scripts

                    - folder for every controller

        - library    

            - Zend

        - tests

        - web_root           

            - css

            - js

            - img

            - index.php

            - .htaccess

SQL - A Little Complex

2011-04-09T03:21:00.000+07:00

A little complex queries:
$q = "SELECT forum_topic.id, forum_topic.title, forum_user.username, forum_topic.date, forum_topic.time, count(forum_reply.tid) as 'count' FROM forum_user, forum_topic, forum_reply WHERE forum_user.id=forum_topic.uid AND forum_topic.id=forum_reply.tid GROUP BY forum_reply.tid";

C - Function Call

2011-04-07T22:15:00.000+07:00

Here's a way on how to call function like the most avaiable in many software, like PHP, Apache or other software that built by C:

#define PO_FUNC(bar) bar()

What that means is that whenever you want to call a function, you do it by
PO_FUNC(your_function_name)

Here's an example:

#include <stdio.h>

#define PO_FUNC(bar) bar()

void hello(){

    printf("Hello For All"); 

}

int main(int argc, char* argv[]){

    PO_FUNC(hello);    // This is the same case as hello()

    return 0;

}

Smarty - Inheritance

2011-04-06T03:50:00.000+07:00

To include another template file in a template file, for example you want to include footer and header
index.tpl

<html>

</head> 

<title>Hello</title>

</head>

<body>

{include file="header.tpl" param="New York"} 

<h1>Main Body</h1>

{include file="footer.tpl"} 

</body>

</html>

What's the more powerful than this one is inheritance:
parent.tpl

<html>

<head>

<title>Hello</title>

</head>

<body>

{block name="content"}Default Content{/blcok}

</body>

</html>

child.tpl
{block name="content"}The New Content{/block}

Smarty - Basic Syntax

2011-04-06T03:30:00.000+07:00

Your main file is php file: index.php
Then your template file is a file that has .tpl extension
In index file, you write:

<?php

require_once('../libs/Smarty.class.php');

$smarty = new Smarty();

$smarty->assign('title', 'Personal Web Service');

$smarty->display('index.tpl');

?>

Then your tempate file, looks like:

<h1>Title: {$title}</h1>

Smarty - Starting Up

2011-04-06T03:05:00.000+07:00

Download Smarty template engine..
In your project directory, create 4 directories
1. cache
2. configs
3. templates - places your tempalete file here (.tpl)
5. templates_c

In your php file that need transfer data to template file, use include the smarty class file
require("../libs/Smarty.class.php");
$smarty = new Smarty();

Django - Admin Page

2011-04-05T05:42:00.000+07:00

To make your application visible from admin panel, try to make admin.py in your app directory. But before do it, lets update some file:
1. urls.py -> uncomment line 4,5,15
2. settings.py -> uncomment line 94

from data.models import Personal

from django.contrib import admin

admin.site.register(Personal)

Remember that this use:
project = dj
app = data
site = Personal

Django - Shell

2011-04-05T05:11:00.000+07:00

from django.db import models

# Create your models here.

class Personal(models.Model):
   name = models.CharField(max_length=20)
   city = models.CharField(max_length=20)
   age = models.IntegerField()

   def __unicode__(self):
       return self.name

For example, you have models file like the above one, then on python manage.py shell (data is your project)

>>> from data.models import Personal

>>> p = Personal.objects.all()

>>> p = Personal(name='lady gaga', city='new york', age=24)

>>> p.save()     # flush the buffer

>>> p.name = 'Lady Gagah'   #updating

>>> p.save()

CakePHP - Metadata Digging

2011-04-05T01:05:00.000+07:00

On view file, you can show the metada on the CakePHP:

<?php

var_dump($this);

var_dump($form);

var_dump($html);

PHP - Caching The Page

2011-04-05T01:04:00.000+07:00

<?php

    date_default_timezone_set('Asia/Jakarta');
    
    // get the url as file name
    $file = md5($_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']);
    
    $cachefile = 'cache/'.$file.'.html';
    
    // get this page file name
    $file_page = __FILE__;

    if (file_exists($cachefile) && (filemtime($file_page)) < filemtime($cachefile)) {

        // this must be included because the file cache comes from here.
        include($cachefile);

        echo "<!– Cached ".date('H:i', filemtime($cachefile))." –>n";

        exit;

    }

    ob_start(); // start the output buffer

?>

<h1>...Everything Here Is Cached...</h1>

<?php

    $fp = fopen($cachefile, 'w'); // open the cache file for writing

    fwrite($fp, ob_get_contents()); // save the contents of output buffer to the file

    fclose($fp); // close the file

    ob_end_flush(); // Send the output to the browser

?>

Apache - Customize Errof Page

2011-04-04T23:49:00.002+07:00

In your .htaccess file, write:
ErrorDocument 404 /error.html
It needs to add trailing slash to work.

Apache - RewriteEngine

2011-04-04T23:37:00.000+07:00

RewriteEngine module is used for rediracting a url to another one. If you want to redirect index.php to hello.php, you write .htaccess file

RewriteEngine On

RewriteRule ^index\.html$ hello.php

Then when user access domain.com, the will get what the contents in hello.php without see the the intuitive url.

Apache - Automatic Include File

2011-04-04T23:26:00.000+07:00

To automate an include file, write in your htaccess file:

php_value auto_prepend_file path/to/file.php

php_value auto_append_file path/to/file.php

Python - Console I/O

2011-04-04T20:38:00.000+07:00

Input:
1. For input just percharacter character

    initial = sys.stdin.read(1)

2. For evaluating expression:

    sum = input('Enter expression: ')

3. For string input:
name = raw_input('Enter your name: ')

CakePHP - Creating Elements

2011-04-04T04:23:00.000+07:00

Elements is a lightweight html component. It lies on the app\view\elements\hello.ctp
Then on the view, you can access it by

<?php echo $this->element('hello'); ?>

And you can also pass the value from the view to the element by second arguments, like this one:
<?php echo $this->element('hello',array('name'=>'Lady Gaga'));?>

CakePHP - Creating Layout

2011-04-04T03:41:00.000+07:00

Layout is a part of presentation side of CakePHP. Just copy the default.ctp in cake/libs/view/layouts/default.ctp to app/views/layout/default.ctp
The customize it:
1. Loading title:

<?php echo $title_for_layout;?>

2. Loading content

<?php echo $content_for_layout;?>

3. Loading css file that lies on webroot/css/some.css

<?php echo $html->css('filname_without_extenstion');?>

4. Loading javascript file that lies on webroot/js/some.js
a. In controller file, add var $helpers = array('Javascript');
b. In the layout, add <?php echo $javascript->link('filename_without_ext');?>

CakePHP - The Structure

2011-04-02T02:28:00.000+07:00

When you are ready to build an application after simple setting of configuration, do this:
1. Create a table name like posts

    id int not null auto_increment key,

    title char(50),

    body text,

    created datetime,

    modified datetime

2. The insert some data to it
3. Make controller file in E:\xampp\htdocs\cakephp\app\controllers\posts_controller.php
<?php

class PostsController extends AppController{
    var $name = 'Posts';
    function index(){
        $this->set('posts',$this->Post->find('all'));
    }
    function view($id=null){
        $this->Post->id = $id;
        $this->set('post',$this->Post->read());
        $this->set('hello','This comes from bill');
    }
}

4. Make model file E:\xampp\htdocs\cakephp\app\models\post.php
<?php
class Post extends AppModel{
    var $name = 'Post';
}
5. Make the view file:
    a. index.ctp in E:\xampp\htdocs\cakephp\app\views\posts\index.ctp

<h1>Blog posts</h1>
<table>
<tr>
<th>Id</th>
<th>Title</th>
<th>Created</th>
</tr>

<?php foreach ($posts as $post): ?>
<tr>
<td><?php echo $post['Post']['id']; ?></td>
<td>
<?php echo $html->link($post['Post']['title'],
array('controller' => 'posts', 'action' => 'view', $post['Post']['id'])); ?>
</td>
<td><?php echo $post['Post']['created']; ?></td>
</tr>
<?php endforeach; ?>

</table>

    b. view.ctp E:\xampp\htdocs\cakephp\app\views\posts\view.ctp

<h1><?php echo $post['Post']['title']?></h1>
<p><small>Created: <?php echo $post['Post']['created']?></small></p>
<p><?php echo $post['Post']['body']?></p>

<?php print_r($post);?>
<?php print $hello;?>

PyQt - 2D Graphics

2011-04-01T04:51:00.000+07:00

import sys
from PyQt4 import QtGui, QtCore

class Editor(QtGui.QWidget):

   def __init__(self):
       super(Editor, self).__init__()
       self.initUI()

   def initUI(self):

       self.setGeometry(200, 100, 400, 300)
       self.setWindowTitle('Editor App')
       self.setWindowIcon(QtGui.QIcon('e.png'))

   def paintEvent(self, e):
       qp = QtGui.QPainter()
       qp.begin(self)
       qp.drawRect(10,10,100,100)
       qp.end()

app = QtGui.QApplication(sys.argv)
file = Editor()
file.show()
sys.exit(app.exec_())

PyQt - Editor

2011-04-01T03:47:00.002+07:00

import sys
from PyQt4 import QtGui, QtCore

class Editor(QtGui.QWidget):

    def __init__(self):
        super(Editor, self).__init__()
        self.initUI()

    def initUI(self):

        self.setGeometry(200, 100, 400, 300)
        self.setWindowTitle('Editor App')
        self.setWindowIcon(QtGui.QIcon('e.png'))

        self.editor = QtGui.QTextEdit(self)
        self.editor.setGeometry(10, 10, 380, 250)

        self.openFile = QtGui.QPushButton('Open', self)
        self.saveFile = QtGui.QPushButton('Save As Plain Text', self)
        self.saveHTML = QtGui.QPushButton('Save As HTML', self)
        self.pbExit = QtGui.QPushButton('Exit', self)

        self.openFile.setGeometry(10, 270, 70, 20)
        self.saveFile.setGeometry(85, 270, 120, 20)
        self.saveHTML.setGeometry(210, 270, 100, 20)
        self.pbExit.setGeometry(315, 270, 70, 20)

        self.connect( self.openFile, QtCore.SIGNAL('clicked()'), self.openPlease )
        self.connect( self.saveFile, QtCore.SIGNAL('clicked()'), self.savePlease )
        self.connect( self.saveHTML, QtCore.SIGNAL('clicked()'), self.saveHtmlPlease )
        self.connect( self.pbExit, QtCore.SIGNAL('clicked()'), QtGui.qApp, QtCore.SLOT('quit()'))

    def openPlease(self):
        filename = QtGui.QFileDialog.getOpenFileName(self, 'Open File', '.')
        fname = open(filename)
        data = fname.read()
        fname.close()
        self.editor.setText(data)

    def savePlease(self):
        filename = QtGui.QFileDialog.getSaveFileName(self, 'Save File', '.')
        fname = open(filename, 'w')
        fname.write(self.editor.toPlainText())
        fname.close()

    def saveHtmlPlease(self):
        filename = QtGui.QFileDialog.getSaveFileName(self, 'Save File', '.')
        fname = open(filename, 'w')
        fname.write(self.editor.toHtml())
        fname.close()


app = QtGui.QApplication(sys.argv)
file = Editor()
file.show()
sys.exit(app.exec_())

PyQt - File Dialog

2011-04-01T03:18:00.001+07:00

To get a filename using open file dialog, use: 
filename = QtGui.QFileDialog.getOpenFileName(self, 'Open File', '.')

fname = open(filename)

data = fname.read()

self.textEdit.setText(data)
fname.close()

While to save data to file, from example from textEdit:

filename = QtGui.QFileDialog.getSaveFileName(self, 'Save File', '.')
fname = open(filename, 'w')
fname.write(textEdit.toPlainText())
fname.close()

PyQt - Message Box

2011-04-01T02:53:00.000+07:00

QtGui.QMessageBox.information(self, 'Message Title', 'The Bosy Text', QtGui.MessageBox.No | QtGui.MessageBox.Yes || QtGui.MessageBox.Cancel)

The type of message:
1. information
2. question
3. warning
4. critical

The type of the button:
1. Yes
2. No
3. Save
4. Cancel
5. Discard
6. Ok
7. Open

JS - Simulation Of Gerak Peluru

2011-04-01T00:19:00.000+07:00

<h1>Gerak Parabola</h1>
<p id="info" style="font: 12px sans-serif;">x: <span id="x"></span> | y: <span id="y"></span> | v: <span id="v"></span></p>
<canvas id="canvas" style="border: 1px solid blue;">Not Supported</canvas>
<div id="right" style="float: right; ">
 <table>
  <tr><td>Degree</td><td>:</td><td><input type="text" id="degree"/></td></tr>
  <tr><td>Initial Velocity</td><td>:</td><td><input type="text" id="velocity"/></td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td><td><input type="button" value="Run" onclick="run()"/></td></tr>
 </table>
</div>
<script>
var Lucia = Lucia || {};
Lucia.GerakParabola = function(){

// screen dimension
this.screenWidth = 500;
this.screenHeight = 200;

// getting the elements
this.canvas = document.getElementById('canvas');
this.xInfo = document.getElementById('x');
this.yInfo = document.getElementById('y');
this.vInfo = document.getElementById('v');

// setting the initial condition
this.ctx = canvas.getContext('2d');
this.canvas.height = this.screenHeight; 
this.canvas.width = this.screenWidth; 
this.ctx.fillStyle = '#88f';

// box properties
this.width = 10;
this.height = 10;

this.vBefore = 60;
this.vHozAfter = 0;
this.vVerAfter = 0;
this.degree = 60; 
this.g = 10;
this.xBefore = 0;
this.xAfter = 0;
this.yBefore = 0;
this.yAfter = 0;
this.dt = 0.1;
 }
Lucia.GerakParabola.prototype.move = function(){

// getting the velocity component
this.vHozAfter = this.vBefore*Math.cos(this.toRadian(this.degree));
this.vVerAfter = this.vBefore*Math.sin(this.toRadian(this.degree)) - this.g*this.dt;

// getting the position of horizontal and vertical
this.xAfter = this.vBefore*this.dt*Math.cos(this.toRadian(this.degree));
this.yAfter = this.vBefore*this.dt*Math.sin(this.toRadian(this.degree)) - 0.5*this.g*this.dt*this.dt;

// summing the time
this.dt = this.dt+1;

// update the box;
this.ctx.clearRect(0, 0, 500, 200)
this.ctx.fillRect(this.xAfter, this.screenHeight - this.yAfter - this.height, this.width, this.height);

// display info
this.xInfo.innerHTML = Math.round(this.xAfter);
this.yInfo.innerHTML = Math.round(this.yAfter);
this.vInfo.innerHTML = Math.round(this.vHozAfter); 
  
// setting the timer
var lol = this;
setTimeout(function(){lol.move();},1000);          
}

// convert degree to radian
Lucia.GerakParabola.prototype.toRadian = function(degree){
 return (degree/57);
}
Lucia.GerakParabola.prototype.setDegree = function(d){
 this.degree = this.toRadian(d);
}
Lucia.GerakParabola.prototype.setInitVelocity = function(v){ 
 this.vBefore = v;
}

function run(){
 var degree = document.getElementById('degree');
 var velocity = document.getElementById('velocity');
 var gp = new Lucia.GerakParabola();
// gp.setDegree(eval(degree.value));
// gp.setInitVelocity(eval(velocity.value));
 gp.move(); 
}
</script>

http://mediabelajaronline.blogspot.com/2010/10/gerak-peluruparabola.html

JS - Simulation Of Gravitational Forces

2011-03-31T23:00:00.002+07:00

<h1>Canvas Element</h1>
<p style="font: 12px sans-serif;">height: <span id="h"></span><br/>velocity: <span id="v"></span></p>
<canvas id="canvas" style="border: 1px solid blue;">Not Supported</canvas>

<script>     

var Lucia = Lucia || {};

Lucia.UpDown = function(){

 this.ws = 500; // width screen
 this.hs = 300; // height screen

 this.canvas = document.getElementById('canvas');
 this.dh = document.getElementById('h');
 this.dv = document.getElementById('v');

 this.canvas.width = this.ws;
 this.canvas.height = this.hs; 

 this.ctx = this.canvas.getContext('2d');

 this.xo = 10;
 this.hAfter = 1;
 this.width = 30;    // width of the object
 this.height = 20;   // height of the object
 this.vBefore = 70;       // early velocity. default 50
 this.dt = 0.05;     // how fast the speed. default 0.1
 this.g = 10;
 this.vAfter = 0;        // velocity thereafter
 this.hBefore = 0;   // 

} 

// setting for dt
Lucia.UpDown.prototype.setDeltaT = function(dt){
 this.dt = dt;
}

// set the initial velocity
Lucia.UpDown.prototype.setInitialVelocity = function(v){
 this.vBefore = v;
}

// set the height of the canvas
Lucia.UpDown.prototype.setHeight = function(h){
 this.hs = h;
 this.canvas.height = this.hs;
}

// this function do update for the box drawing
Lucia.UpDown.prototype.move = function(tmo){

  // draw the box
 this.ctx.fillStyle = '#88f';

 // clear the canvas
 this.ctx.clearRect(0, 0, this.ws, this.hs);

 // apply the equation
 this.hAfter = this.hBefore + this.vBefore*this.dt - 0.5*this.g*this.dt*this.dt; 
 this.vAfter = this.vBefore-this.g*this.dt;
  
 // update the box
 this.ctx.fillRect(this.xo, (this.hs-this.height-this.hAfter), this.width, this.height);

 // displaying the data to screen
 this.dh.innerHTML = Math.round(this.hAfter);
 this.dv.innerHTML = Math.round(this.vAfter);

 // swapping before and after variable
 this.hBefore = this.hAfter; 
 this.vBefore = this.vAfter; 

 // set the timer
 var lol = this;
 setTimeout(function(){lol.move(tmo);},tmo);  
}
 var data = new Lucia.UpDown();
 data.setHeight(100)
 data.setDeltaT(0.1)
 data.setInitialVelocity(50)
 data.move(100)   

</script>

PyQt - QComboBox

2011-03-31T00:02:00.002+07:00

import sys
from PyQt4 import QtGui, QtCore

app = QtGui.QApplication(sys.argv)
widget = QtGui.QWidget()

widget.setGeometry(200, 100, 400, 300)
widget.setWindowTitle('PyQt Application')

cb = QtGui.QComboBox(widget)
label = QtGui.QLabel(widget)

lang = ['Python','Java','Javascript','PHP','C','C++','Ruby']
for i in lang:
    cb.addItem(i)

cb.setGeometry(10, 10, 150, 20)
label.setGeometry(170, 10, 100, 20)

def hello(text):
    label.setText(text)

widget.connect(cb, QtCore.SIGNAL('activated(QString)'), hello)

widget.show()
sys.exit(app.exec_())

PyQt - QLineEdit

2011-03-30T23:42:00.003+07:00

import sys
from PyQt4 import QtGui, QtCore

app = QtGui.QApplication(sys.argv)
widget = QtGui.QWidget()

widget.setGeometry(200, 100, 400, 300)
widget.setWindowTitle('PyQt Application')

save = QtGui.QPushButton('Save', widget)
name = QtGui.QLineEdit(widget)
show = QtGui.QLabel(widget)

name.setGeometry(10, 10, 200, 20)
save.setGeometry(10, 40, 80, 20)
show.setGeometry(100, 100, 200, 20)

def showText():
    show.setText(name.text())
widget.connect(save, QtCore.SIGNAL('clicked()'), showText)

widget.show()
sys.exit(app.exec_())

pyQt - QProgressBar

2011-03-30T23:15:00.000+07:00

import sys
from PyQt4 import QtGui, QtCore

app = QtGui.QApplication(sys.argv)
widget = QtGui.QWidget()

widget.setGeometry(200, 100, 400, 300)
widget.setWindowTitle('PyQt Application')

pb = QtGui.QProgressBar(widget)
pb.setGeometry(10, 10, 300, 20)
pb.setValue(50)

widget.show()
sys.exit(app.exec_())

PyQt - QSlider

2011-03-30T23:08:00.003+07:00

import sys
from PyQt4 import QtGui, QtCore

app = QtGui.QApplication(sys.argv)
widget = QtGui.QWidget()

widget.setGeometry(200, 100, 400, 300)
widget.setWindowTitle('PyQt Application')

slider = QtGui.QSlider(QtCore.Qt.Horizontal, widget)
slider.setGeometry(10, 10, 200, 30)
slider.setFocusPolicy(QtCore.Qt.NoFocus)

def getValue(value):
    print value
widget.connect(slider, QtCore.SIGNAL('valueChanged(int)'), getValue)

widget.show()
sys.exit(app.exec_())

PyQt - QCheckBox

2011-03-30T23:08:00.000+07:00

import sys
from PyQt4 import QtGui, QtCore

app = QtGui.QApplication(sys.argv)
widget = QtGui.QWidget()

widget.setGeometry(200, 100, 400, 300)
widget.setWindowTitle('PyQt Application')


show = QtGui.QCheckBox('Ayam Bakar',widget)

show.move(10, 10)

def hello():
    if show.isChecked():
        widget.setWindowTitle('Ayam Bakar')
    else:
        widget.setWindowTitle('')
        
widget.connect(show, QtCore.SIGNAL('stateChanged(int)'), hello)

widget.show()
sys.exit(app.exec_())

PyQt - Multiple CheckBox

2011-03-30T22:53:00.002+07:00

import sys
from PyQt4 import QtGui, QtCore

app = QtGui.QApplication(sys.argv)
widget = QtGui.QWidget()

widget.setGeometry(200, 100, 400, 300)
widget.setWindowTitle('PyQt Application')

foods = ['Ayam Bakar','Lalapan','Soto','Sate'];
len = len(foods)
cb = []
a = 0

for i in foods:
    cb.append(QtGui.QCheckBox(i, widget))
    a = a + 1;
    
a = 0
for i in foods:
    cb[a].move(10, 20*a)
    a = a + 1

def hello():
    for i in range(0,len):
        if cb[i].isChecked():
            widget.setWindowTitle(foods[i])
            break;
        else:
            widget.setWindowTitle('None')
            
for i in range(0,len):
    widget.connect(cb[i], QtCore.SIGNAL('stateChanged(int)'), hello)

widget.show()
sys.exit(app.exec_())

PyQt - QPushButton

2011-03-30T22:32:00.000+07:00

import sys
from PyQt4 import QtGui, QtCore

app = QtGui.QApplication(sys.argv)
widget = QtGui.QWidget()

widget.setGeometry(200, 100, 400, 300)
widget.setWindowTitle('PyQt Application')

close = QtGui.QPushButton(QtGui.QIcon('lucia.png'), 'Close', widget)
close.setGeometry(10, 10, 100, 30)

def hello():

print 'hello everybody'

widget.connect(close, QtCore.SIGNAL('clicked()'), hello)

widget.show()
sys.exit(app.exec_())

PyQt - QWidget

2011-03-30T21:41:00.003+07:00

import sys
from PyQt4 import QtGui

app = QtGui.QApplication(sys.argv)
widget = QtGui.QWidget()

#widget.resize(400, 300)
widget.setGeometry(200, 100, 400, 300)
widget.setWindowTitle('PyQt Application')
widget.setWindowIcon(QtGui.QIcon('lucia_2d.png'))
widget.setToolTip('Indonesia is a nice one')
widget.setStyleSheet('background: blue') 
widget.setWindowStyle(0.5)

widget.show()
sys.exit(app.exec_())

PyQt - Introduction

2011-03-30T21:36:00.000+07:00

Below is the basic setting for displaying the app using PyQt:

import sys
from PyQt4 import QtGui

app = QtGui.QApplication(sys.argv)
widget = QtGui.QWidget()

widget.show()
sys.exit(app.exec_())

Canvas - Gravitational Forces

2011-03-30T21:14:00.001+07:00

<!-- This program provide implementation for gravitational forces using Javascript OOP style -->

<h1>Gravitational Forces</h1>
<canvas id="canvas">Not Supported</canvas>

<script> 

function GF(id){
 this.x = 30;
 this.y = 0;
 this.width = 50;
 this.height = 30;
 this.screen_width = 500;
 this.screen_height = 2000;
 this.vo = 0;
 this.vt = 0;
 this.ho = 0;
 this.ht = 0;
 this.canvas = document.getElementById(id);
 this.ctx = this.canvas.getContext('2d');
 this.canvas.height = this.screen_height;
 this.canvas.width = this.screen_width;
 this.g = 10;
 this.t = 0;

}
GF.prototype.drawLine = function(){
 for(var i=0;i<100;i++){
  this.ctx.fillStyle = '#444';
  this.ctx.fillText(i,1,i*30);
 }
}
GF.prototype.down = function(){
 this.ht = this.ho + 0.5 * this.g * this.t * this.t;
 this.vt = this.vo + this.g * this.t;
 this.t = this.t + 0.1;

 this.ctx.clearRect(20, 0, this.screen_width, this.screen_height);
 this.ctx.fillRect(this.x, this.ht, this.width, this.height);

 this.ctx.fillStyle = '#10f';
 this.ctx.fillText('v: '+Math.round(this.vt),this.x+5,this.ht+10);
 this.ctx.fillText('h: '+Math.round(this.ht),this.x+5,this.ht+20);
 this.ctx.fillStyle = '#af0';

 var d = this;
 setTimeout(function(){d.down();},100); 

}

var gf = new GF('canvas');

gf.down();

gf.drawLine();

</script>

PyQt - Reference

2011-03-30T05:41:00.000+07:00

QtGui Reference:
1. Label

   label = QtGui.QLabel('Lucia Corp', widget)

   label.move(10, 10)

2. Button
button = QtGui.QPushButton('Close', widget)

   button.setGeometry(10, 10, 80, 30)

3. Textarea

    textEdit = QtGui.QTextEdit()

    widget.setCentralWidget(textEdit)

4. Input Dialog

    text, ok = QtGui.QInputDialog.getText(widget, 'Login', 'Enter your name:')

5. Color Dialog

    color = QtGui.QColorDialog.getColor()

6. Font Dialog

    font, okey = QtGui.QFontDialog.getFont()

7. File Dialog
filename = QtGui.QFileDialog.getOpenFileName(widget, 'Open File', 'E:\')
8. Calendar

    calendar = QtGui.QCalendarWidget(widget)

print calendar.selectedDate()
9. Pixmap

    pixmap = QtGui.QPixmap('lucia.png')

label.setPixmap(pixmap)

AJAX - Sample Of Post Method

2011-03-29T04:38:00.002+07:00

<table>
<tr><td>Name</td><td>:</td><td><input type="text" id="name"/></td></tr>
<tr><td>City</td><td>:</td><td><input type="text" id="city"/></td></tr>
<tr><td>Age</td><td>:</td><td><select id="age">
    <?php
        $output = '';
        for($i=21; $i<61; $i++){
            $output .= '<option value="'.$i.'">'.$i.'</option>';
        }
        echo $output;
    ?>
    </select></td></tr>
<tr><td>&nbsp;</td><td>&nbsp;</td><td><input type="button" onclick="Send()" value="Send"/></td></tr>
</table>

<script>
    var lucia = lucia || {};
    lucia.getById = function(id){
        return document.getElementById(id);
    }
    function Send(){
        var name = lucia.getById('name');
        var city = lucia.getById('city');
        var age = lucia.getById('age');
        
        var data = {
            'name': name.value,
            'city' : city.value,
            'age' : age.value
        };
        var json_data = JSON.stringify(data);
        
        var ajax = new XMLHttpRequest();
        ajax.open('POST','hello.php', false);
        ajax.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
        ajax.send('data='+json_data);
        
        var response = eval('('+ajax.responseText+')');
        
        
        
        
    }
</script>

PHP - PDO MySQL

2011-03-29T03:29:00.002+07:00

<?php

$hostname = 'localhost';
$username = 'root';
$password = 'indonesia';

try{
    $db = new PDO("mysql:host=$hostname;dbname=a", $username, $password);
    echo 'Connected to database';
    $db = null;
}catch(PDOException $e){
    echo $e->getMessage();
}

Drupal - Skills In Drupal

2011-03-29T02:40:00.002+07:00

There are some fundamental skills in drupal:
1. Theming
2. Module Creation:
a. Menu
b. Form
c. Ajax
d. Database

HTML5 - Rotate

2011-03-27T00:03:00.000+07:00

To make rotate transformation, use translate first, then rotate, then back to translate again:
ctx.translate(230,10)
ctx.rotate(45/57)
ctx.translate(-230,-10);
ctx.fillRect(230, 10, 100, 100)

Drupal - Manu

2011-03-24T23:33:00.000+07:00

It's so simple to make a menu in Drupal, just like this below:

<?php

function mac_menu(){

    $item = array();

    $item['mac/main'] = array(

        'title' => 'Mac Menu',

        'page callback' => 'main',

        'access callback' => TRUE,

);

    return $item;

}

function main(){

    return t('Hello. This is mac main menu');

}

Django - Handling Data

2011-03-24T05:23:00.000+07:00

>>> sys.path.append('C:\\Python27\\Project\\App')

>>> sys.path.append('C:\\Python27\\lucia\\blog')

>>> import your_app

>>> import blog

>>> User.object.all()

>>> u = User(username='lady gaga', password='secret')

>>> u.save() 

>>> p.id

>>> p.username

>>> p.password

You can update a value in a table just by:

>>> p.username = 'aura kasih'

>>> p.save()

To get the table as object, use:

>>> a = User.objects.all()

>>> for i in a:

print i.username, i.password