将字节转换为 kb、mb、gb 等的 ActionScript 代码

发布于 2024-11-03 08:48:40 字数 828 浏览 1 评论 0原文

我有一个实用程序函数，可以像 Windows 资源管理器一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。我想知道我编写的代码是否正确，以及是否可以变得更简单。

我编写的函数如下：

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);
    }

虽然它目前为我完成了工作，但我觉得它可以用更简单的方式编写，甚至可以优化。

提前致谢

原文

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.

The function that i wrote is as follows :

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);
    }

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.

thanks in advance

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后知后觉 2024-11-10 08:48:40

这是一种更简单的方法：

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];
}

为了完整性，我将其包含到 yottabytes :)

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 :)

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枕花眠 2024-11-10 08:48:40

@J_A_X 有最好的方法来做到这一点，但是对于未来，我建议当您发现您有像您一样的嵌套 if...else...if 语句时尽早返回。

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);
}

@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);
}

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~没有更多了~