Python string identity: `is` and `in` statements
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'is' operator behaves differently when comparing strings with spaces
29419
'AND' vs '&&' as operator
16292
Python string interning
39485
Why does ('0' ? 'a' : 'b') behave different than ('0' == true ? 'a' : 'b')
143939
How do you use: isalnum, isdigit, isupper to test each character of a string?
95734
Check if something is (not) in a list in Python
120837
Difference between EXISTS and IN in SQL?
24937
What's the best way to check if a String represents an integer in Java?
120169
Expected identifier, string or number
30955
Check if a string contains an element from a list (of strings)
43038
Java in operator
132179
Is  && statement() the same as if() statement()?
154049
why does if("string") evaluate "string" as true but if ("string"==true) does not?
1736
How do the PHP equality (== double equals) and identity (=== triple equals) comparison operators differ?
87552
How to test if a string is basically an integer in quotes using Ruby
116138
Identify if a string is a number
91894
ANTLR - Distinguish 'IS NOT NULL' from 'IS NULL'