swap out character in middle of string

private function swapOutCharacterChunk
( //used because some numbered assets have the number in the MIDDLE of them.
baseWord:String,
search:String,
replace:String
)
{
    var halves:Array = baseWord.split(search);
    if (halves.length > 2) { throw new Error("replaces only ONE") };
    return ( halves[0] + replace + halves[1] );
}

//example:
var originalText = "GetThis#Thingy";
var newText:String = swapOutCharacterChunk(originalText, "#", "3");
trace("newText==" + newText);

//output:
newText==GetThis3Thingy

//not overly useful.
//should really make your artists adhere to naming conventions than do this.