Regex to remove javascript double slash (//) style comments
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.
My current regex is (?<!:)//[^rn]* 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;
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?
(Updated based on comments)
It looks like this works pretty well:
(?<=".*".*)//.*$|(?<!".*)//.*$
It appears that the test cases in Regex Hero show that it'll match comments the way I think it should (almost).
For instance, it'll completely ignore this line:
var XSLPath = "//" + Node;
But it's smart enough to match the comment at the end of this line:
var XSLPath = "//"; // stuff to remove
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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