ActionScript code to convert bytes to kb, mb, gb etc

Question

I have a utility function that will display a filesize in an appropriate form like Windows Explorer does, i.e; convert it to nearest KB, MB, GB etc. I wanted to know if the

Answer 1

@J_A_X has the best way to do this, however for the future, I suggest returning early when you find you have nested if...else...if statements like you have.

public static function formatFileSize(bytes:int):String
{
    if(bytes < 1024)
        return bytes + " bytes";

    bytes /= 1024;
    if(bytes < 1024)
        return bytes + " Kb";

    bytes /= 1024;
    if(bytes < 1024)
        return bytes + " Mb";

    bytes /= 1024;
    if(bytes < 1024)
        return bytes + " Gb";

    return String(bytes);
}

Answer 2

Here's a simpler way of doing it:

private var _levels:Array = ['bytes', 'Kb', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];

private function bytesToString(bytes:Number):String
{
    var index:uint = Math.floor(Math.log(bytes)/Math.log(1024));
    return (bytes/Math.pow(1024, index)).toFixed(2) + this._levels[index];
}

I included it up to yottabytes for completeness :)