JavaScript相当于PHP函数：array_flip [英] JavaScript equivalent of PHP function: array_flip

问题描述

是否有任何捷径可以完成相当于 PHP的array_flip功能在JavaScript中还是必须通过暴力循环来完成？

Is there any shortcut to accomplishing the equivalent of PHP's array_flip function in JavaScript or does it have to be done via brute force looping?

它必须用于几十个阵列，所以即使很小的加速也可能加起来。

It has to be used for dozens of arrays so even small speedups will probably add up.

推荐答案

不要认为内置了一个。示例实现此处，虽然：）。

Don't think there's one built in. Example implementation here, though :).

function array_flip( trans )
{
    var key, tmp_ar = {};

    for ( key in trans )
    {
        if ( trans.hasOwnProperty( key ) )
        {
            tmp_ar[trans[key]] = key;
        }
    }

    return tmp_ar;
}

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