| re: Regular Expression to Match Blank Characters outside Multiline Comments
I wrote another one:
(?<=(?:\*/)(?:[^/\*]|(?<!/)\*|/(?!\*))*)\s+(?=(?:[^\*/]|(?<!\*)/|\*(?!/))*(?:/\*))|(?<=\A(?:[^/\*]|(?<!/)\*|/(?!\*))*)\s+(?=(?:[^\*/]|(?<!\*)/|\*(?!/))*(?:/\*))|(?<=(?:\*/)(?:[^/\*]|(?<!/)\*|/(?!\*))*)\s+(?=(?:[^\*/]|(?<!\*)/|\*(?!/))*\z)|(?<=\A(?:[^/\*]|(?<!/)\*|/(?!\*))*)\s+(?=(?:[^\*/]|(?<!\*)/|\*(?!/))*\z)
I did some simple test, and it works:)
[color=blue]
> Hi, all,
> I'm now writing a program to compress JavaScript code. One puzzle is
> how
> to write a regular expression to find out and remove all the redundent
> blank
> spaces. However, those blank spaces that are in the comments should be
> kept
> intact.
> I've tried to write some Regexs, and I list them here for your
> information:
> regex = new Regex(@"/\*[\s\S]*?\*/"); // pattern used to match a
> multiline
> comment block
> regex = new Regex(@"//[^@\n]*\n"); // pattern used to match a
> single-line
> comment
> regex = new Regex(@"(?<!(?://[^\n]*))\s+"); // pattern used to match
> blank
> characters outside single-line comments
> Now the problem is how to match all the continuous blank characters
> outside
> multiline comments?
> regex = new Regex(@"(?<!(?:/\*[\s\S]*))\s+");
> but this does not work, and will lead to a CPU dead-loop with no
> reaction
> for a long time.
>
> I'm a newbie in Regular Expression. Can sombody help me? Thanks a lot!
>
> Best regards, Laser Lu
>[/color]
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