How can I test whether a string only contains characters in a given set?
1358
Validate that string contains only allowed characters in Ruby
28684
Check if a string contains a string in C++
143939
How do you use: isalnum, isdigit, isupper to test each character of a string?
63332
How can one represent a string pattern with prohibited substrings?
108888
What is the fastest way to compare two sets in Java?
10610
How can I check if a single character appears in a string?
34585
How to check if a String is numeric in Java
130637
How can I check if a word is contained in another string using PHP?
43229
How to check if a string contains only digits in Java
100612
How to check if a string "StartsWith" another string?
134928
Check if string contains only digits
6320
How to determine if a string contains any matches of a list of strings
41132
String contains any items in an array (case insensitive)
11189
'is' operator behaves differently when comparing strings with spaces
12419
How to check if a String contains another String in a case insensitive manner in Java?
98355
Is the set of all possible binary strings countable?
10951
Case insensitive 'Contains(string)'