有没有自动变平的jQuery map实用程序吗? [英] Is there a jQuery map utility that doesn't automically flatten?

问题描述

我正在将一个由两个域组成的数组从一个域(日期)映射到另一个域(时间戳).不幸的是，它看起来像jQuery.map自动展平了我返回的两个元组，并且我没有看到do_not_flatten参数.

I'm mapping an array of two-tuples from one domain (dates) to another (timestamps). Unfortunately, it looks like jQuery.map auto-flattens the two-tuples I return, and I don't see a do_not_flatten parameter.

我是否在库中丢失了无法自动拼合的其他内容?

Am I missing something else in the library that won't auto-flatten?

附录:我假设我不应该使用不会自动变平的Array.map，因为它是

Addendum: I assume that I shouldn't be using Array.map, which does not auto-flatten, because it is JavaScript 1.6. As I understand it, jQuery is supposed to abstract away the JavaScript version I'm running for compatibility reasons.

推荐答案

我遇到了同样的问题；事实证明，您可以只从$ .map回调内部返回嵌套数组，而不会使外部数组变平坦:

I was having the same problem; it turns out you can just return a nested array from within the $.map callback and it won't flatten the outer array:

$.map([1, 2, 3], function(element, index) {
  return [ element + 1, element + 2 ];
});
=> [2, 3, 3, 4, 4, 5]

位置:

$.map([1, 2, 3], function(element, index) {
  return [ [ element + 1, element + 2 ] ];
});
=> [[2, 3], [3, 4], [4, 5]]

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