Python re search/match "|" issue
6338
What is the difference between re.search and re.match?
52235
Case insensitive regular expression without re.compile?
103986
restrict 1 word as case sensitive and other as case insensitive in python regex | (pipe)
135424
Difference between "or" and || in Ruby?
113601
What is the difference between .*? and .* regular expressions?
19211
PHP if not equal(!=) and or (||) issue. Why doesnt this work?
23494
How to make  grep display only the matching regexp?
19592
What does ||= (or-equals) mean in Ruby?
124082
What's a faster operation, re.match/search or str.find?
78438
OR condition in regular expression in perl
83564
How to grep lines which does not begin with "#" or ";"?
73024
PHP regex delimiters, / vs. | vs. {} , what are the differences?
141442
Why does my string comparison fail?
57812
The search is *incorrectly* returning a *no results* message
154437
Regex: match first slash in url -- thats it!! ? not working for some reason?
96996
Search and Replace question
101144
How to match, but not capture, part of a regex?