[AS2] Simple Find And Replace

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1

I had a minute so I whipped up this;

[SIZE=4]String.replace()[/SIZE]
string.slice(replaceFrom:String, replaceTo:String*[, caseSensitive:Boolean]*) : String

Returns a string that replaces all substrings of a string within a main string. The original String object is not modified. If the end parameter is not specified, the end of the substring is the end of the string. If the caseSensitive[FONT=Verdana] parameter is not specified[/FONT] it is read as [FONT=Courier New]false[/FONT][FONT=Verdana], and case sensitivity is applied.[/FONT]

Parameters

replaceFrom:String - The string that will be replaced.
replaceTo:String - What all instances of [FONT=Courier New]replaceFrom [/FONT][FONT=Verdana]will be replaced to.[/FONT]
[FONT=Verdana]caseSensitive:Boolean - Whether or not all instances of [FONT=Courier New]replaceFrom [/FONT][FONT=Verdana]will be replaced to [FONT=Courier New]replaceTo[/FONT], regardless of it’s case. Default is [FONT=Courier New]true[/FONT].[/FONT][/FONT]
Returns

String - A whole string of the specified string with all instances of [FONT=Courier New]replaceFrom [FONT=Verdana]replaced with[/FONT] replaceTo[/FONT].
Example

The following example creates a variable, string, assigns it a String value, and then calls the replace() method using a variety of values for the replaceFrom[FONT=Verdana], [/FONT]replaceTo and caseSensitive parameters. Each call to replace() is wrapped in a trace() statement that displays the output in the Output panel.

var string:String = "An Apple a day KeePs The Doctor away"
String.prototype.replace = function(replaceFrom:String, replaceTo:String, caseSensitive:Boolean):String  {
 var start:Array = this.split(replaceFrom);
 tmp = start.join(replaceTo);
 if (!caseSensitive) {
  var start:Array = tmp.split(replaceFrom.toLowerCase());
  tmp = start.join(replaceTo);
  var start:Array = tmp.split(replaceFrom.toUpperCase());
  tmp = start.join(replaceTo);
 }
 return tmp;
};
// Replace all instances of "Apple" in string with "n Slice Of Cake"
// Case sensitive is not specified, it will be read assumed true
trace(string.replace("n Apple", " Slice Of Cake"));
// Returns "A Slice Of Cake a day KeePs The Doctor away"
 
// Replace all instances of "a" in string with "b"
// Case sensitive is specified as true
trace(string.replace("a", "b", true));
// Returns "An Apple b dby KeePs The Doctor bwby"
 
// Replace all instances of "a" in string with "b"
// Case sensitive is specified as false
trace(string.replace("a", "b", false));
// Returns "bn bpple b dby KeePs The Doctor bwby"

EDIT: Had the case sensitivy around the wrong way around