如何使用JavaScript格式化Twitter / Facebook提要日期 [英] How to format Twitter/Facebook feed date with JavaScript

问题描述

我正在寻找这个确切问题的答案：如何仅在JS中使用Objective-C格式化Facebook / Twitter日期（从JSON提要）。

I'm looking for an answer to this exact question: How to format Facebook/Twitter dates (from the JSON feed) in Objective-C only in JS.

是

从Twitter返回的日期如下：Wed Oct 17 21:22:27 +0000 2012
还有FB它看起来像这样：2012-10-18T11：21：30 + 0000

The date returned from Twitter looks like this: Wed Oct 17 21:22:27 +0000 2012 And from FB it looks like this: 2012-10-18T11:21:30+0000

我觉得很奇怪（而且很烦人），他们没有unix时间戳，有人看到了这个原因吗？

I find it very strange (and highly annoying) that they don't include a unix timestamp, anyone see a reason for this?

推荐答案

日期字符串解析是一个非常常见的问题，对此肯定已经有答案了。无论如何...

Date string parsing is a very frequently asked question, there are surely answers already for this. Anyhow...

如果日期格式为2012-10-18T11：21：30 + 0000（几乎等于ISO8601），且偏移量始终为+0000（您可以使用以下方法创建合适的日期对象：

If the date format is 2012-10-18T11:21:30+0000 (which is pretty much ISO8601) and the offset is always +0000 (i.e. UTC), you can create a suitable date object using:

function isoStringToDate(s) {
  var b = s.split(/[-t:+]/ig);
  return new Date(Date.UTC(b[0], --b[1], b[2], b[3], b[4], b[5]));
}

，它将返回为该UTC时间设置的本地日期对象。请注意，这取决于将用户系统设置为适当的时区。

which will return a local date object set for that UTC time. Note that this depends on the user's system being set to an appropriate timezone.

可以转换Facebook格式（2012年10月17日星期三21:22:27 +0000）类似地：

The Facebook format (Wed Oct 17 21:22:27 +0000 2012) format can be converted similarly:

function fbStringToDate(s) {
  var b = s.split(/[: ]/g);
  var m = {jan:0, feb:1, mar:2, apr:3, may:4, jun:5, jul:6,
           aug:7, sep:8, oct:9, nov:10, dec:11};

  return new Date(Date.UTC(b[7], m[b[1].toLowerCase()], b[2], b[3], b[4], b[5]));
}

再次假设偏移量始终为+0000（UTC）。如果需要其他偏移量，可以在返回之前将其应用于创建的日期对象。

Again assuming that the offset it always +0000 (UTC). If there is a need for some other offset, it can be applied to the created date object before returning it.

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