double not (!!) vs type coercion in JavaScript
42395
When to use the double not (!!) operator in JavaScript
19249
Type Checking: typeof, GetType, or is?
148271
Why to avoid creating objects of primitives in JavaScript?
15469
Difference between ! vs !! vs * in /etc/shadow
72571
Should I use single or double colon notation for pseudo-elements?
108376
Best way to "negate" an instanceof
93360
Performance differences between equal (=) and IN with one literal value
134755
Why do compilers allow string literals not to be const?
145413
Floating point comparison `a != 0.7`
12879
How dangerous is it to compare floating point values?
55524
How to find out if the value contained in a string is double or not
70140
Is there a VB.net equivalent for C#'s ! operator?
665
Which equals operator (== vs ===) should be used in JavaScript comparisons?
153083
Does the equal sign make a difference in brace initialization? eg. 'T a = {}' vs 'T a{}'
992
Why is it considered a bad practice to omit curly braces?
53119
parseInt vs unary plus, when to use which?
42605
Is there a technical reason to use > (<) instead of != when incrementing by 1 in a 'for' loop?