正则表达式来删除JavaScript的双斜杠（//）风格的注释 [英] Regex to remove javascript double slash (//) style comments

问题描述

我想做去除通过正则表达式JavaScript注释在C＃中，并已成为卡住了。我想删除双斜线的任何事件// 样式的注释。

I'm trying to do remove javascript comments via regex in C# and have become stuck. I want to remove any occurrences of double slash // style comments.

我目前的正则表达式是（小于：？！）// [^ \ r \ n]的* 将捕获所有的意见和prevent匹配的http：// 。然而，消极的后向懒惰，当然咬了我回到了下面的测试案例：

My current regex is (?<!:)//[^\r\n]* which will catch all comments and prevent matching of http://. However, the negative lookbehind was lazy and of course bit me back in the following test case:

var XSLPath = "//" + Node;

所以，我在找一个正规的前pression将进行回顾后，看是否在比赛前出现偶数的双引号（） 。我不知道这是可能的。或者，也许有更好的方法来做到这一点？

So I'm looking for a regular expression that will perform a lookbehind to see if an even number of double quotes (") occurs before the match. I'm not sure if this is possible. Or maybe there's a better way to do this?

推荐答案

（更新基于评论）的

它看起来像这样的作品pretty的还有：

It looks like this works pretty well:

(?<=".*".*)//.*$|(?<!".*)//.*$

目前看来，在正则表达式英雄的测试用例表明它会匹配的意见，我认为它应该的方式（几乎）。

It appears that the test cases in Regex Hero show that it'll match comments the way I think it should (almost).

例如，它会完全忽略这一行：

For instance, it'll completely ignore this line:

var XSLPath = "//" + Node;

但它是足够聪明，以匹配注释这行的末尾：

But it's smart enough to match the comment at the end of this line:

var XSLPath = "//"; // stuff to remove

不过，它不是足够聪明，知道如何处理的意见前3个或更多引号。我不完全知道如何解决这个问题没有硬编码。你需要一些方法来使偶数引号。

However, it's not smart enough to know how to deal with 3 or more quotation marks before the comment. I'm not entirely sure how to solve that problem without hard-coding it. You need some way to allow an even number of quotes.

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