Question

I was thinking the fastest way of building a string with a fill char.define a function:

fillString('A',12); // return 'AAAAAAAAAAAA'

A simple loop could do this, but it’s not very fast if I want to fill millions characters.

Is this the fastest way of combining string in actionscript?

array.join('');

If so, the first you need to build an array first,that would consume too much space.

Once I was thinking a stringbuffer class but I think it would be slower than using String directly.

Answer 1

This is probably not the correct actionscript syntax, but you should get the idea:

public function fillString(filler:String, count:integer):String {
    var result:String = filler;
    while (result.length <= count/2)
        result += result;
    return result+result.substr(0,count-result.length);
}