Flex3/ActionScript3.0中eval的替代方案

AS3中没有eval，但可以像这样调用：

this["your_function_name"]();

请看例子：

private function playTrack(location:String):void {

 var dot_position:Number = location.lastIndexOf('.');
 var file_ext:String = location.substr(dot_position+1);
 
 var play_function_name:String = file_ext+"_player";
 if (this.hasOwnProperty(play_function_name)) {
  this[play_function_name]();
 }else {
  Alert.show("Do not support this file extension("+file_ext+").");
 }
 
}

参考：http://livedocs.adobe.com/flex/3/html/help.html?content=ProgrammingHTMLAndJavaScript_03.html

Zend Studio specify a variable to a class for hint

a example is:

/* @var $m Memcache */
$m = memcache_connect();

Create symbol link on Windows

一直在Linux下用symbol link创建链接，实现Apache的DocumentRoot到Developing Directory的链接。每次开新Branch都换一下链接即可。

本以为用cygwin的ln可以解决这个问题，但发现cygwin的ln命令竟然只是创建了一个windows的shortcut。Shit，于是找到了一个替代的方案，使用junction，这是一个介绍：

Windows 2000 and higher supports directory symbolic links, where a directory serves as a symbolic link to another directory on the computer. For example, if the directory D:\SYMLINK specified C:\WINNT\SYSTEM32 as its target, then an application accessing D:\SYMLINK\DRIVERS would in reality be accessing C:\WINNT\SYSTEM32\DRIVERS. Directory symbolic links are known as NTFS junctions in Windows. Unfortunately, Windows comes with no tools for creating junctions—you have to purchase the Win2K Resource Kit, which comes with the linkd program for creating junctions. I therefore decided to write my own junction-creating tool: Junction. Junction not only allows you to create NTFS junctions, it allows you to see if files or directories are actually reparse points. Reparse points are the mechanism on which NTFS junctions are based, and they are used by Windows' Remote Storage Service (RSS), as well as volume mount points.

Using Junction

Usage: [-s]
-s Recurse subdirectories


If you want to create or delete a junction, use Junction like this:

Usage: [-d] []

To delete a junction specify the -d switch and the junction name.

创建出来的symbol link很漂亮，一个像快捷方式的小箭头都没有。

下载地址：
http://technet.microsoft.com/en-us/sysinternals/bb896768.aspx

a way to Limit textarea max length.

a way to Limit textarea max length.

function keyup_info_description( inLengthMaximum ) {
    if ( inLengthMaximum < document.getElementById('info_description').value.length )
        document.getElementById('info_description').value =  document.getElementById('info_description').value.slice( 0, inLengthMaximum );
}