In django, named capturing groups are passed to your view as keyword arguments. Unnamed capturing groups (just a parenthesis) are passed to your view as arguments. The ?P is a named capturing group, as opposed to an unnamed capturing group. http://docs.python.org/library/re.html (?P<name>…) Similar to regular parentheses, but the substring matched by the group is accessible within … Read more
Yeah, you need to grab the result of matcher.replaceAll():
Assuming you want the part between single quotes, use this regular expression with a Matcher: Example: Result: the data i want
You could use a negative look-ahead assertion: Or a negative look-behind assertion: Or just plain old character sets and alternations:
I would try a character class regex similar to Add whatever characters you wish to match inside the []s. Be careful to escape any characters that might have a special meaning to the regex parser. You then have to iterate through the matches by using Matcher.find() until it returns false.
You can stick optional whitespace characters \s* in between every other character in your regex. Although granted, it will get a bit lengthy. /cats/ -> /c\s*a\s*t\s*s/
Regular expressions actually aren’t part of ANSI C. It sounds like you might be talking about the POSIX regular expression library, which comes with most (all?) *nixes. Here’s an example of using POSIX regexes in C (based on this): Alternatively, you may want to check out PCRE, a library for Perl-compatible regular expressions in C. The Perl … Read more
For this specific example, in the general case: Since this answer gained popularity for some reason, here’s a bonus: regex generator. Expand snippet
This should do what you’re looking for: Usage: Will output: abcdef-g Edit: Hey, just a quick question, how can I prevent multiple hyphens from being next to each other? and have them replaced with just 1?
Square brackets are meant for character class, and you’re actually trying to match any one of: s, |, s (again), e, a, s (again), o and n. Use parentheses instead for grouping: or non-capturing group: Note: Non-capture groups tell the engine that it doesn’t need to store the match, while the other one (capturing group does). For small stuff, either works, for ‘heavy duty’ stuff, you … Read more