通过索引偶数或奇数拆分数组两个数组 [英] Split array into two arrays by index even or odd

问题描述

我有这样的数组：

$array = array(a, b, c, d, e, f, g);

我想它取决于两个数组拆分如果指数是奇数还是偶数，如：

I want to split it in two arrays depending if the index is even or odd, like this:

$odd = array(a, c, e, g);

$even = array(b, d, f);

在此先感谢！

推荐答案

一个解决方案，使用匿名函数和 array_walk ：

One solution, using anonymous functions and array_walk:

$odd = array();
$even = array();
$both = array(&$even, &$odd);
array_walk($array, function($v, $k) use ($both) { $both[$k % 2][] = $v; });

这分离在短短的一通阵列上的项目，但它的cleverish边位。这不是真的比任何经典之作，更详细

This separates the items in just one pass over the array, but it's a bit on the "cleverish" side. It's not really any better than the classic, more verbose

$odd = array();
$even = array();
foreach ($array as $k => $v) {
    if ($k % 2 == 0) {
        $even[] = $v;
    }
    else {
        $odd[] = $v;
    }
}

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