正则表达式在数字之间替换 [英] Regex replace between digits

问题描述

我有以下时间码要替换:

I have the following timecode I want to do a replace on:

00 04 02 01 -- > 00:04:02:01

如何用冒号替换两个数字之间的空格?我想出了 \d\s\d，但这显然也包括数字.

How would I replace the space between the two digits with a colon? I have come up with \d\s\d, but that obviously includes the digits as well.

推荐答案

捕捉你的数字，然后在替换时使用它们:

Capture your digits, then use them when replacing:

(\d)\s(?=\d)

替换为:

$1:

<小时>

以下示例使用 JavaScript:

---

The following example uses JavaScript:

var str = '00 04 02 01';
str = str.replace(/(\d)\s(?=\d)/g, '$1:');

这是小提琴:http://jsfiddle.net/7arUa/

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