DZone Snippets: remove code

HTML/JavaScript - Select list - Add/Remove Options (DOM)

bradalyst (brad) — Wed, 22 Aug 2007 12:39:41 GMT

from http://www.mredkj.com/tutorials/tutorial005.html

Overview

* Insert Before Selected - A new option is created and added above the selected option (as determined by selectedIndex). If none are selected, then no option is added.
* Remove Selected - Deletes the selected option (or options) from the list. If no options are selected, no options are deleted.
* Append Last - No matter what is selected, a new option is added at the end.
* Remove Last - No matter what is selected, the last option is deleted from the list.

Explanation

According to DOM Level 1, the following is the syntax for the add and remove methods in HTMLSelectElement:

void add(in HTMLElement element, in HTMLElement before) raises(DOMException);
void remove(in long index);

The add method takes two arguments: the element to add, and the element to insert before. The spec also says you can add to the end of the list by passing null as the second argument.

The remove method just takes a number: the index of the option to be removed.

The JavaScript

The HTML







Insert Before Selected




Remove Selected









Append Last




Remove Last

Remove comments from a file

fak3r (fak3r) — Wed, 20 Jun 2007 18:24:22 GMT

Remove all comment lines from a file.



sed -e '/^#/d' $1 | more

or to output it to a new file



sed -e '/^#/d' $1 > $1.nocomments

remove dublicate lines form

BlackHalt (BlackHalt) — Sat, 09 Jun 2007 01:08:56 GMT

111111
1111
11
222
222
33333
4444
1111
22



<br /><?php 
<br />$a=array_unique(explode("\n", $_POST['lines']));
<br />#natsort($a);
<br />echo implode("\n",$a);
<br />?>
<br />

result:
111111
1111
11
222
33333
4444
22

BlockFlash-Revisited.user.js

mcandre (Andrew Pennebaker) — Wed, 29 Nov 2006 01:03:18 GMT



// ==UserScript==

// @name		BlockFlash-Revisited

// @namespace		http://snippets.dzone.com/posts/show/3054

// @description	Do not start Flash animation until you click on them.

// @include		*

// @exclude		http://www.macromedia.com/*

// @exclude		http://www.atomfilms.com/*

// @exclude		http://uploads.ungrounded.net/*

// @exclude		http://www.albinoblacksheep.com/*

// ==/UserScript==



/*

	Revised by Andrew Pennebaker (andrew.pennebaker@gmail.com)



	Author: Jos van den Oever (jos@vandenoever.info)



	License: GPL



	Version history:

		2006-02-12: initial version

		2006-11-28: changed appearance



Inspiration for this script comes from the removeFlash script and the FlashBlock firefox extension.

*/



(function () {

	var objects=document.getElementsByTagName("object");



	for (i=0; i		var flash=objects[i];



		if (flash.innerHTML.match(/.swf|shockwave|flash/)) {

			var placeholder=document.createElement("div");



			placeholder.style.cursor='pointer';

			placeholder.style.background='orange'; // 'gray '

			placeholder.style.textAlign='center';

			placeholder.style.color='black';

			placeholder.innerHTML="[Play Flash]";



			flash.parentNode.insertBefore(placeholder, flash);

			flash.on=false;



			placeholder.addEventListener(

				'click',

				function() {

					if (flash.on) {

						flash.style.display='none';

						placeholder.innerHTML="[Play Flash]";

						flash.on=false;

					}

					else {

						flash.style.display='';

						placeholder.innerHTML="[Stop Flash]";

						flash.on=true;

					}

				},

				true

			);



			flash.style.display='none';

		}

	}

})();

Delete empty directories (UNIX)

jasonbentley (Jason Bentley) — Sat, 18 Nov 2006 03:21:34 GMT

// Shell command to delete empty directories. May have to run several times to get everything.



find . -type d -empty | xargs rmdir -

drop-highest - remove the highest value from a series

gregg.irwin (Gregg Irwin) — Fri, 29 Sep 2006 18:31:03 GMT



drop-highest: func [block] [head remove maximum-of block]

drop-lowest - remove the lowest value from a series

gregg.irwin (Gregg Irwin) — Fri, 29 Sep 2006 18:30:17 GMT



drop-lowest:  func [block] [head remove minimum-of block]

Javascript Manipulate Class Names

Will_Rickards (Will Rickards) — Wed, 20 Sep 2006 21:34:35 GMT

I often have to manipulate class names of objects in javascript.
But className can have multiple classes in it.
These functions deal with that.



// ----------------------------------------------------------------------------

// HasClassName

//

// Description : returns boolean indicating whether the object has the class name

//    built with the understanding that there may be multiple classes

//

// Arguments:

//    objElement              - element to manipulate

//    strClass                - class name to add

//

function HasClassName(objElement, strClass)

   {



   // if there is a class

   if ( objElement.className )

      {



      // the classes are just a space separated list, so first get the list

      var arrList = objElement.className.split(' ');



      // get uppercase class for comparison purposes

      var strClassUpper = strClass.toUpperCase();



      // find all instances and remove them

      for ( var i = 0; i < arrList.length; i++ )

         {



         // if class found

         if ( arrList[i].toUpperCase() == strClassUpper )

            {



            // we found it

            return true;



            }



         }



      }



   // if we got here then the class name is not there

   return false;



   }

// 

// HasClassName

// ----------------------------------------------------------------------------





// ----------------------------------------------------------------------------

// AddClassName

//

// Description : adds a class to the class attribute of a DOM element

//    built with the understanding that there may be multiple classes

//

// Arguments:

//    objElement              - element to manipulate

//    strClass                - class name to add

//

function AddClassName(objElement, strClass, blnMayAlreadyExist)

   {



   // if there is a class

   if ( objElement.className )

      {



      // the classes are just a space separated list, so first get the list

      var arrList = objElement.className.split(' ');



      // if the new class name may already exist in list

      if ( blnMayAlreadyExist )

         {



         // get uppercase class for comparison purposes

         var strClassUpper = strClass.toUpperCase();



         // find all instances and remove them

         for ( var i = 0; i < arrList.length; i++ )

            {



            // if class found

            if ( arrList[i].toUpperCase() == strClassUpper )

               {



               // remove array item

               arrList.splice(i, 1);



               // decrement loop counter as we have adjusted the array's contents

               i--;



               }



            }



         }



      // add the new class to end of list

      arrList[arrList.length] = strClass;



      // add the new class to beginning of list

      //arrList.splice(0, 0, strClass);

      

      // assign modified class name attribute

      objElement.className = arrList.join(' ');



      }

   // if there was no class

   else

      {



      // assign modified class name attribute      

      objElement.className = strClass;

   

      }



   }

// 

// AddClassName

// ----------------------------------------------------------------------------





// ----------------------------------------------------------------------------

// RemoveClassName

//

// Description : removes a class from the class attribute of a DOM element

//    built with the understanding that there may be multiple classes

//

// Arguments:

//    objElement              - element to manipulate

//    strClass                - class name to remove

//

function RemoveClassName(objElement, strClass)

   {



   // if there is a class

   if ( objElement.className )

      {



      // the classes are just a space separated list, so first get the list

      var arrList = objElement.className.split(' ');



      // get uppercase class for comparison purposes

      var strClassUpper = strClass.toUpperCase();



      // find all instances and remove them

      for ( var i = 0; i < arrList.length; i++ )

         {



         // if class found

         if ( arrList[i].toUpperCase() == strClassUpper )

            {



            // remove array item

            arrList.splice(i, 1);



            // decrement loop counter as we have adjusted the array's contents

            i--;



            }



         }



      // assign modified class name attribute

      objElement.className = arrList.join(' ');



      }

   // if there was no class

   // there is nothing to remove



   }

// 

// RemoveClassName

// ----------------------------------------------------------------------------

removeDir //PHP Function

jonasraoni (Jonas Raoni Soares Silva) — Sun, 20 Aug 2006 21:26:33 GMT

Removes a folder, including its subfolders and files in a efficient way without recursion, returns Boolean.



//+ Jonas Raoni Soares Silva

//@ http://jsfromhell.com



function removeFolder($dir){

	if(!is_dir($dir))

		return false;

	for($s = DIRECTORY_SEPARATOR, $stack = array($dir), $emptyDirs = array($dir); $dir = array_pop($stack);){

		if(!($handle = @dir($dir)))

			continue;

		while(false !== $item = $handle->read())

			$item != '.' && $item != '..' && (is_dir($path = $handle->path . $s . $item) ?

			array_push($stack, $path) && array_push($emptyDirs, $path) : unlink($path));

		$handle->close();

	}

	for($i = count($emptyDirs); $i--; rmdir($emptyDirs[$i]));

}

remove-all - remove all values matching the value arg from the series

gregg.irwin (Gregg Irwin) — Thu, 25 May 2006 03:07:40 GMT



remove-all: func [series value] [remove-each val series [val = value]]