通过数组和输出循环作为对（分每一秒元素） [英] Looping through array and output as pairs (divider for each second element)

问题描述

我有匿名元素的数组。元素通过PHP添加到阵列，像这样：

I have an array with anonymous elements. Elements are added to the array via php, like so:

$playlist = array();

while (databaseloop) {
  $playlist[] = $a_title;
  $playlist[] = $a_length;
}

echo json_encode(array('playlist'=>$playlist));

所以数组变为：

["Hello.mp3", "00:00:14", "Byebye.mp3", "00:00:30", "Whatsup.mp3", "00:00:07", "Goodnight.mp3", "00:00:19"] and so on

然后，我检索该数组jQuery中使用Ajax后。所有这一切工作正常。

Then I retrieve this array in jquery with ajax post. All that works fine.

现在，我正在寻找一种方式来对待/输出所有数组元素在JavaScript / jQuery的对。 做什么每个第二个元素。像这样的：

Now, I'm looking for a way to treat/output all array elements as pairs in javascript/jquery. "do something" for each second element. Like this:

foreach (two_elements_in_array) {
  // output track name
  // output track time
  // output some divider
}

如何才能做到这一点？

How can this be done?

推荐答案

好吧，也许这是最基础的解决方案：

Well, maybe this is the most basic solution:

for (var i = 0; i < arr.length; i += 2) {
    var title = arr[i];
    var len = arr[i+1];
}

---

不过，我会建议你安排 $播放列表如下：

while (databaseloop) {
    $playlist[] = array(
        "title" => $a_title,
        "length" => $a_length
    );
}

然后，它会很容易与简单迭代的元素：

Then it will be easy to iterate the elements simply with:

for (var i = 0; i < arr.length; i++) {
    var title = arr[i]['title'];
    var len = arr[i]['length'];
}

这篇关于通过数组和输出循环作为对（分每一秒元素）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！