Is !0 and !1 something more than a shorthand for true/false?
18190
Is there any point of using "return !0" in javascript?
71607
What's this =! operator?
28734
Why is "a" != "a" in C?
92055
In JavaScript, why is "0" equal to false, but when tested by 'if' it is not false by itself?
42395
When to use the double not (!!) operator in JavaScript
145413
Floating point comparison `a != 0.7`
70705
What does `!!~` mean in javascript?
36537
do { ... } while (0) — what is it good for?
60338
Null vs. False vs. 0 in PHP
76808
Meaning of ! in Java syntax
154567
difference between null != something and something != null
57332
!! c operator, is a two NOT?
101128
What is "?:" notation in JavaScript?
86037
char!=(signed char), char!=(unsigned char)
12091
Are if else statement equivalent to logical and && or || and where should I prefer one over the other?
84817
What is the symbol you'd use for Boolean results?
132179
Is  && statement() the same as if() statement()?