动作code转换成字节，以KB，MB，GB等 [英] ActionScript code to convert bytes to kb, mb, gb etc

问题描述

我有一个效用函数，将在像Windows资源管理器，即以适当的形式显示文件大小;将其转换为最接近的KB，MB，GB等。我想知道，如果code，我写的是正确的，如果它可以变得简单。

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 code that i wrote is correct, and if it can be made simpler.

这是我写的功能如下：

public static function formatFileSize(bytes:int):String
    {
        if(bytes < 1024)
            return bytes + " bytes";
        else
        {
            bytes /= 1024;
            if(bytes < 1024)
                return bytes + " Kb";
            else
            {
                bytes /= 1024;
                if(bytes < 1024)
                    return bytes + " Mb";
                else
                {
                    bytes /= 1024;
                    if(bytes < 1024)
                        return bytes + " Gb";
                }
            }
        }
        return String(bytes);
    }

虽然它的工作对我的那一刻，我觉得可以写在一个更简单的方法，甚至进行了优化。

While it does the job for me at the moment, i feel it could be written in an even simpler way and maybe even optimized.

在此先感谢

推荐答案

下面是这样做的一个简单的方法：

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];
}

我把它高达yottabytes完整性：）

I included it up to yottabytes for completeness :)

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