如何比较数组中的日期以找到最早的日期？ [英] how can I compare dates in array to find the earliest one?

问题描述

我有一个名为dateArray的变量，其日期为
，例如

I have a variable called dateArray with dates in it for example

["09/09/2009", "16/07/2010", "29/01/2001"]

我想要找到最早的一个带有for循环，结果将是

and I want to find the earliest one with a for loop so the result will be

"29/01/2001" - or dateArray[2]

语言是javascript

the language is javascript

推荐答案

有时最基本的方法是最好的：

Sometimes the most basic approach is the best:

var dates = ["09/09/2009", "16/07/2010", "29/01/2001"];
var min = dates[0];
for(var i = 1; i < dates.length; i++) {
  if (fDate(dates[i]) < fDate(min))
    min = dates[i];
}

alert(min);

// create a proper Date object from the string
function fDate(s) {
  var d = new Date();
  s = s.split('/');
  d.setFullYear(s[2]);
  d.setMonth(s[1]);
  d.setDate(s[0]);
  return d;
}

我上面为你写的代码转换每个将字符串转换为Date对象，然后从它们中找到最小值（最早的日期）。没有字符串黑客，只是简单的日期比较。它返回数组中的原始字符串。

The code I wrote for you above converts each string into a Date object, and then finds the minimum (the earliest date) from them. No string hacks, just straightforward date comparison. It returns the original string from the array.

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