Adding An Array Element At Arbitrary Index

From ActionScriptWiki

This snippet will add an object at an arbitrary index while preserving the order of the array. The method can be optimized a little bit more if array.length is known of course.

function addObjectAtIndex( array: Array, object: Object, index: int ): void
{
	if( 0 == index )
		array.unshift( object );
	else
	if( array.length == index )
		array.push( object );
	else
		array.splice( index, 0, object );
}