Are Python and JavaScript regular expression syntax identical?
If not, then:
- What are the important differences between them
- Is there a python library that "implements" JavaScript regexps?
views:
295answers:
3+1: Wow, what a lot of stuff.
S.Lott
2009-03-11 21:53:34
Thanks! My attempts at googling the answer failed.Now, I guess the follow up question is: "Is there a python library that 'implements' javascript regexps?"
Dave Peck
2009-03-11 21:59:05
I don't know of one. What is the root reason for wanting one?
EBGreen
2009-03-12 13:14:04
@EBGreen: I'd like a Python library compatible with EMCA regex because I want consistency between a regex search in Python on the back-end and a Javascript one on the front-end.
Brian M. Hunt
2010-07-06 14:05:07
+1
A:
http://www.regular-expressions.info/javascript.html vs http://www.regular-expressions.info/python.html
Alex Reitbort
2009-03-11 21:44:12
A:
Part 1
They are different; One difference is Python supports Unicode and Javascript doesn't.
Part 2
Read Mastering Regular Expressions. It gives information on how to identify the back-end engines (DFA vs NFA vs Hybrid) that a regex flavour uses. It gives tons of information on the different regex flavours out there.
There is way too much information to convey on a single SO answer, so you're better off having a solid piece of reference material on the subject.
(Yes, I'm from Canada... how could you tell, eh?)
Gavin Miller
2009-03-11 21:48:57