String may only contain A, U, G or C
9258
Test if string ONLY contains given characters
89933
How do I avoid trailing empty items being removed when splitting strings?
63332
How can one represent a string pattern with prohibited substrings?
58046
How to check whether a string contains a substring in JavaScript?
14256
How to form a regex to recognize correct declaration of variable names
120682
How do I verify that a string only contains letters, numbers, underscores and dashes?
130443
How can I use backslashes (\) in a string?
57035
Removing all fraction symbols like “¼” and “½” from a string
25073
How to compare Unicode strings in Javascript?
46987
Does Python have a string 'contains' substring method?
29654
How to make sure that JTextField contains only letters?
427
Why does a RegExp with global flag give wrong results?
75102
How do I get the raw representation of a string in Python?
27572
What's the u prefix in a Python string?
141442
Why does my string comparison fail?
78395
Checking whole string with a regex
54135
Finding the set of strings over {a, b} that do not contain the substring aaa