JavaScript Utilities Library

Aaron Gustafson May 18, 2007

General

This script provides functions for browsers which do not inherently support the entire JavaScript Core and supplies some useful functions PHP developers might wish they had access to.

Notes

Created by: Aaron Gustafson
Web Site: http://www.easy-designs.net/
Posted: May 18, 2007

Source Code

Paste this source code into the designated areas.

External file

Paste this code into an external JavaScript file named: jsUtilitiesLib.js

/*------------------------------------------------------------------------------
This script and many more are available free online at
The JavaScript Source!! http://www.javascriptsource.com

Filename:       jsUtilities Library
Author:         Aaron Gustafson (aaron at easy-designs dot net)
                unless otherwise noted
Creation Date:  4 June 2005
Version:        2.1
Homepage:       http://www.easy-designs.net/code/jsUtilities/
License:        Creative Commons Attribution-ShareAlike 2.0 License
                http://creativecommons.org/licenses/by-sa/2.0/
Note:           If you change or improve on this script, please let us know by
                emailing the author (above) with a link to your demo page.
------------------------------------------------------------------------------*/
// ---------------------------------------------------------------------
//                      array.push (if unsupported)
// ---------------------------------------------------------------------
if(Array.prototype.push == null) {
  Array.prototype.push = function(item) {
    this[this.length] = item;
    return this.length;
  };
};
// ---------------------------------------------------------------------
//                      array.shift (if unsupported)
// ---------------------------------------------------------------------
if (Array.prototype.shift == null) {
  Array.prototype.shift = function() {
    var response = this[0];
    for (var i=0; i < this.length-1; i++) {
      this[i] = this[i + 1];
    };
    this.length--;
    return response;
  };
};
// ---------------------------------------------------------------------
//                  function.apply (if unsupported)
//           Courtesy of Aaron Boodman - http://youngpup.net
// ---------------------------------------------------------------------
if (!Function.prototype.apply) {
  Function.prototype.apply = function(oScope, args) {
    var sarg = [];
    var rtrn, call;
    if (!oScope) oScope = window;
    if (!args) args = [];
    for (var i = 0; i < args.length; i++) {
      sarg[i] = "args["+i+"]";
    };
    call = "oScope.__applyTemp__(" + sarg.join(",") + ");";
    oScope.__applyTemp__ = this;
    rtrn = eval(call);
    oScope.__applyTemp__ = null;
	return rtrn;
  };
};
// ---------------------------------------------------------------------
//                               inArray()
//                           [Port from PHP]
//               Hunts for a value in the specified array
// ---------------------------------------------------------------------
function inArray(needle) {
  for (var i=0; i < this.length; i++) {
    if (this[i] === needle) {
      return true;
    }
  }
  return false;
}

Array.prototype.inArray = inArray;
// ---------------------------------------------------------------------
//                               isArray()
//                           [Port from PHP]
//                  verifies if something is an array
// ---------------------------------------------------------------------
function isArray() {
  return (typeof(this.length)=="undefined") ? false : true;
};
Array.prototype.isArray = isArray;
// ---------------------------------------------------------------------
//                               ksort()
//                           [Port from PHP]
//                     sorts an array by key names
// ---------------------------------------------------------------------
function ksort() {
  var sArr = [];
  var tArr = [];
  var n = 0;
  for (i in this)
    tArr[n++] = i+"|"+this[i];
  tArr = tArr.sort();
  for (var i=0; i<tArr.length; i++) {
    var x = tArr[i].split("|");
    sArr[x[0]] = x[1];
  }
  return sArr;
}
Array.prototype.ksort = ksort;
// ---------------------------------------------------------------------
//                             addClass()
//                 appends the specified class to the object
// ---------------------------------------------------------------------
function addClass(theClass) {
  if (this.className != '') {
    this.className += ' ' + theClass;
  } else {
    this.className = theClass;
  }
}
Object.prototype.addClass = addClass;
// ---------------------------------------------------------------------
//                           removeClass()
//                 removes the specified class to the object
// ---------------------------------------------------------------------
function removeClass(theClass) {
  var oldClass = this.className;
  var regExp = new RegExp('\\s?'+theClass+'\\b');
  if (oldClass.indexOf(theClass) != -1) {
    this.className = oldClass.replace(regExp,'');
  }
}
Object.prototype.removeClass = removeClass;
// ---------------------------------------------------------------------
//                      lastChildContainingText()
//  finds the last block-level text-containing element within an object
// ---------------------------------------------------------------------
function lastChildContainingText() {
  var testChild = this.lastChild;
  var contentCntnr = ['p','li','dd'];
  while (testChild.nodeType != 1) {
    testChild = testChild.previousSibling;
  }
  var tag = testChild.tagName.toLowerCase();
  var tagInArr = inArray.apply(contentCntnr, [tag]);
  if (!tagInArr && tagInArr!==0) {
    testChild = lastChildContainingText.apply(testChild);
  }
  return testChild;
}
Object.prototype.lastChildContainingText = lastChildContainingText;

Head

Paste this code into the HEAD section of your HTML document.


<script type="text/javascript" src="jsUtilitiesLib.js"></script>

Leave a Response

(4 comments)

Yes, but check the new code. It has been corrected.

Lee Jun 5, 2007

Thanks, Simon. I missed that.

Lee Jun 5, 2007

From php, in_array should return true or false,[br /]so "return i" should be "return true"[br /][br /]function inArray(needle) {[br /] for (var i=0; i < this.length; i++) {[br /] if (this[i] === needle) {[br /] return true;[br /] }[br /] }[br /] return false;[br /]}[br /][br /]The function in the original post is actually the php function array_search[br /][br /]function arraySearch(needle) {[br /] for (var i=0; i < this.length; i++) {[br /] if (this[i] === needle) {[br /] return i;[br /] }[br /] }[br /] return false;[br /]}

Simon Tiplady May 21, 2007

Looking at the utility code emailed to me, the inArray function contains an operator ===. Is that correct?

SkewsMe May 20, 2007

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