Difference betwen the [a-z][a-z]* and [a-z]+ regular expressions
6448
Reference - What does this regex mean?
823
How do you use a variable in a regular expression?
37
Regular Expression for alphanumeric and underscores
51317
Regular expression to match digits and basic math operators
130919
Regular expression for letters, numbers and - _
28150
Formal Languages - Regular Expression
40539
How do I use regular expressions in bash scripts?
65086
Regular expression using \\ vs using \
1388
Learning Regular Expressions
137248
regular expressions / pattern matching on ubuntu command line
9011
R regular expressions: unexpected behavior of "[:digit:]"
142285
What's the regular expression that matches a square bracket?
113601
What is the difference between .*? and .* regular expressions?
148063
Python regex - why does end of string ($ and \Z) not work with group expressions?
37456
Does -* have any special meaning in regular expression?
91346
What's different between Python and Javascript regular expressions?
6950
Pattern matching multiple symbols names and powers