Extracting Text Between Words(Pattern) using Regex in JavaScript

Below are the ways to extract text between words in javascript:

Given the String “Name: John Berkins Address: LA, USA”

	var data = "Name: John Berkins Address: LA, USA";

	//using String.indexOf + String.substring
	var name = data.substring(data.indexOf("Name:")+6,data.indexOf("Address"));
	var addr = data.substring(data.indexOf("Address:") + 9);
	alert(name);
	alert(addr);	

	//using Regex (with the use of Non-Capturing Group(?:)
	var rname = data.match(/(?:Name:)(.+)(?:Address:)/)[1];
	var raddr = data.match(/(?:Address:)(.*)/)[1];
	alert(rname);
	alert(raddr);

	//Note: the regex  code above may not work if the data contains \n (newline character)
	//      this is because of the (.+) expression cannot disregards \n chars,
	//      the workaround is to change it to anoter expression or to remove the \n char before
	//		the extraction process: h
	//Example:
	//
	//data = data.replace(/\n/g,' ');
	//var rname = data.match(/(?:Name:)(.+)(?:Address:)/)[1];
	//var raddr = data.match(/(?:Address:)(.*)/)[1];

Generating Unique Strings in Javascript

Here is a simple way to generate a unique string in javascript.

    var ts = (new Date()).getTime().toString();
    var url = "ajaxHandler.php?param1=value1&paramn=valuen&t=" + ts;
    //do ajax call...

This method is very helpful for ajax developers, to overcome the problem of cached ajax requests in IE.

Setting the Page Title in ASP NET from Server Code

Here is a quick n easy way to set the HTML Page Title from the server side, that most developers don’t know yet.

VBNET:

Me.Header.Title = "Title Here"

C#:

this.Header.Title = "Title Here";

TextArea SelectedText, SelectionStart, SelectionEnd, SelStart, SelEnd (IE and FireFox)

Simple way of getting the html textarea’s selection properties selectedText, selectionStart, selectionEnd:

Javascript:

 function getTextAreaSelection() {
   var textArea = document.getElementById('textarea1');
   if (document.selection) { //IE
       var bm = document.selection.createRange().getBookmark();
       var sel = textArea.createTextRange();
       sel.moveToBookmark(bm);

       var sleft = textArea.createTextRange();
       sleft.collapse(true);
       sleft.setEndPoint("EndToStart", sel);
       textArea.selectionStart = sleft.text.length
       textArea.selectionEnd = sleft.text.length + sel.text.length;
       textArea.selectedText = sel.text;
   }
   else if (textArea.selectionStart){ //FF
      textArea.selectedText = textArea.substring(textArea.selectionStart,textArea.selectionEnd);
   }

   alert("Selection Start==> " + textArea.selectionStart + "\n" +
      "Selection End  ==> " + textArea.selectionEnd + "\n" +
      "Selected Text  ==> " + textArea.selectedText + "\n" +
      "TextArea Value ==> " + textArea.value);
 }

HTML:

<textarea id="textarea1"></textarea> <button onclick="getTextAreaSelection()">Get Selection Info</button>

Generating Unique Strings in NET

Approach 1:

String s1 = Guid.NewGuid().ToString();
String s2 = Guid.NewGuid().Tostring("N");
String s3 = Guid.NewGuid().ToString("P");
String s3 = Guid.NewGuid().ToString("D");
[code]

Approach 2:
[code]
String s1 = System.IO.Path.GetRandomeFileName();
String s2 = System.IO.Path.ChangeExtension(System.IO.Path.GetRandomFileName(),null);

Comparison or the 2 Approaches:
1. Approach1 generates at least 32 characters (0-9 and a-f) letters only.
Hint: larger size on the database, absolutely unique.
2. Approach2 Generates at least 8 characters (0-9 and a-z) letters.
Hint: Good for Captcha, less size on the database,  might have duplicates

Reversing Flash Timeline

Just recently, I have encountered a really simple problem that I have hard time figuring out the solution, but in hours of looking for that solution I just found one.

In the web, if we search for reversing a timeline in flash, we will find mostly solutions that are done using another movie clip, but It doesn’t solve my problem. I only need to reverse the timeline without creating another movie clip.

Here’s how I figure it out. The solution that worked for me, is to use the setInterval and the clearInterval.

To do so, create a simple animation/tween, then on the last frame, insert the following action script:

stop();
var speed:Number = 40;
function goto(destination) {
    if (_root._currentframe == destination)
       clearInterval(nIntervals);
    else
       prevFrame();
}
var nIntervals = setInterval(goto, speed,15);

In this, example I assumed you have more than 15 frames in your animation, let say you have 60-frame animation, From frame 60 the timeline will reverse play until frame 15.

Flash Disk Virus Cleaner

I just found this tool in the web and find it useful, save it with .bat extension then execute. It helps a lot.

@ECHO OFF
cls
echo Zabyer Flash Disk Virus Cleaner v1.0.3
echo http://www.zabyer.org
echo Last Updated: October 14, 2007  8:06am
echo ---------------------------------
echo Files that will be deleted:
echo imgkulot, INFO.exe, Desktop.ini, scvhosts.exe
echo TTM*.vbs, krag.exe, sysdll.exe, RavMon.exe, msv*.dll
echo and other flash disk pest!!!
echo ---------------------------------
echo Resetting Stupid Virus attributes...
echo (Disarming flash disk pest!)
attrib -r -h -s -a autorun.*
attrib -r -h -s -a TTM*.*
attrib -r -h -s -a imgkulot*.*
attrib -r -h -s -a RECYCLER\INFO.exe
attrib -r -h -s -a RECYCLER\Desktop.ini
attrib -r -h -s -a sysdll.exe
attrib -r -h -s -a krag.exe
attrib -r -h -s -a RavMon*.*
attrib -r -h -s -a msv*.dll
attrib -r -h -s -a scvhosts.exe
attrib -r -h -s -a svhost.exe
attrib -r -h -s -a C:\Windows\svhost.exe
attrib -r -h -s -a C:\Windows\svhost32.exe
attrib -r -h -s -a "New Folder".exe
echo ---------------------------------
echo Attributes Reset!
echo Preparing Clean-Up Procedures...
echo Next step is to delete all the pest.
echo ---------------------------------
pause
echo ---------------------------------
echo Deleting Stupid Virus...
echo ---------------------------------
del autorun.*
del TTM*.*
del imgkulot*.*
del RECYCLER\INFO.exe
del RECYCLER\Desktop.ini
del sysdll.exe
del krag.exe
del RavMon*.*
del msv*.dll
del scvhosts.exe
del svhost.exe
del C:\Windows\svhost.exe
del C:\Windows\svhost32.exe
del "New Folder".exe
echo ---------------------------------
echo Flash Disk Cleaned-Up!
echo ---------------------------------
echo Please report for new virus so that this Virus Cleaner will be updated. 
echo Send to admin@zabyer.org or camilord@zabyer.org you feedbacks...
echo ---------------------------------
pause

Step-by-step Creation of Executable Jar for Java

1. Start Command Prompt.
2. Navigate to the folder that holds your class files:
   C:\>cd\
   C:\>cd java-code
3. Set path to include JDK’s bin.
	For example:
		C:\java-code> SET PATH=%PATH%:c:\Program Files\Java\jdk1.5.0\bin
4. Compile your class(es):
		C:\java-code> javac TestForm.java
		C:\java-code> javac Main.java
5. Create a manifest file:
	C:\java-code> echo Main-Class: Main >manifest.txt
6. Create a jar file:
	C:\java-code> jar cvfm welcome.jar manifest.txt Main.class TestForm.class
7. Test your welcome.jar:
	C:\java-code> welcome.jar

And that’s it we’re done.