将字节转换为 kb、mb、gb 等的 ActionScript 代码

问题描述：

我有一个实用函数，可以像 Windows 资源管理器那样以适当的形式显示文件大小，即；将其转换为最接近的 KB、MB、GB 等.我想知道我写的代码是否正确，是否可以简化.

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.

我写的函数如下:

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);
    }

虽然目前它对我有用，但我觉得它可以用更简单的方式编写，甚至可以优化.

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.

提前致谢

答

这里有一个更简单的方法:

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];
}

为了完整起见，我将它包含到了 yottabytes :)

I included it up to yottabytes for completeness :)

将字节转换为 kb、mb、gb 等的 ActionScript 代码

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