Array Manipulators for IE

				
'**************************************
' Name: Array Manipulators for IE
' Description:Do you likes to do your programming with arrays in javascript? Ever got stuck to do more coding because the pop, shift and unshift functions were not supported by IE? I did, so I built the functions in a cross-browser environment
' By: Stephane Dorion
'
' Inputs:container : The array to be manipulated
'
' Returns:The modified array
'
' Assumes:If you plan to need the value affected by the functions, I suggest you somehow save them first.
If I manage to implement the functions as they are used in Netscape, I will repost a new version here.
'
' Side Effects:Since I don't know how to exactly affect Javascript's DOM I was not able to implement directly these functions as we are used to call them with Netscape (Ex : myArray.pop())
Using my function you will have to do myArray = pop(myArray)
You will lose the value returned by the usual pop function (the last element)
'
'This code is copyrighted and has' limited warranties.Please see http://www.Planet-Source-Code.com/vb/scripts/ShowCode.asp?txtCodeId=1910&lngWId=14'for details.'**************************************

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function shift(container)
{
// Does the shift function. I rewrite it since IE does not support it
// Remove 1st element of array and returns the array
// since this is not an implicit method of the array i cannot affect the array directly
 var tmpArray = new Array()
 var i=0
 var maxI = container.length
 
 if (maxI > 0)
 {
for (i=1; i <= maxI-1; i++) //Starting at 1 and 0 zero will skip 1st element, thus removing it.
{
 tmpArray[i-1] = container[i]
}
return tmpArray
 }
 else
return null // There is only one or no element so removing it is like setting array to null
}
function pop(container)
{
// Does the pop function. I rewrite it since IE does not support it
// Remove last element of an array and returns the array
// since this is not an implicit method of the array i cannot affect the array directly
 var tmpArray = new Array()
 var i=0
 var maxI=container.length
 
 if (maxI > 0)
 {
for (i=0; i < maxI; i++) // looping with the < and not the <= will skip the last element, thus removing it.
{
tmpArray[i] = container[i]
}
return tmpArray
 }
 else
return null // There is only one or no element so removing it is like setting array to null
}
function unshift(container)
{
// Function will also receive an unlimited number of parameter (they are the items to add)
// Does the unshift function. I rewrite it since IE does not support it
// Add one or more element to the FRONT of an array and returns the array
// since this is not an implicit method of the array i cannot affect the array directly
 var tmpArray = new Array()
 var i=0
 var maxI = container.length
 for (i=1; i <= arguments.length-1; i++) //Add the items
 {
tmpArray[i-1] = arguments[i]
 }
 for (i=0; i <= maxI-1; i++) // Add the rest of the array
 {
tmpArray[tmpArray.length] = container[i]
 }
 return tmpArray
}
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