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 L 1 7403
I wrote another one:
(?<=(?:\*/)(?:[^/\*]|(?<!/)\*|/(?!\*))*)\s+(?= (?:[^\*/]|(?<!\*)/|\*(?!/))*(?:/\*))|(?<=\A(?:[^/\*]|(?<!/)\*|/(?!\*))*)\s+(?= (?:[^\*/]|(?<!\*)/|\*(?!/))*(?:/\*))|(?<=(?:\*/)(?:[^/\*]|(?<!/)\*|/(?!\*))*)\s+(?= (?:[^\*/]|(?<!\*)/|\*(?!/))*\z)|(?<=\A(? :[^/\*]|(?<!/)\*|/(?!\*))*)\s+(?= (?:[^\*/]|(?<!\*)/|\*(?!/))*\z)
I did some simple test, and it works:) 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 This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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