What is the difference between != null and !== null?
10298
Difference between == and === in JavaScript
60338
Null vs. False vs. 0 in PHP
23586
What is the difference between String.Empty and "" (empty string)?
35549
What is the difference between the | and || or operators?
76808
Meaning of ! in Java syntax
124650
Is `if (condition = value)` the correct syntax for comparison?
47477
What is "!!" in C?
105179
Do you prefer "if (var)" or "if (var != 0)"?
665
Which equals operator (== vs ===) should be used in JavaScript comparisons?
143243
Is NULL always false?
42395
When to use the double not (!!) operator in JavaScript
15469
Difference between ! vs !! vs * in /etc/shadow
83354
Nullable types: better way to check for null or zero in c#
38168
What is the Java ?: operator called and what does it do?
97291
if(!x) vs if(x==false) in ruby
45869
Why null cast a parameter?
46395
Is it 100% correct to replace !!someVar with Boolean(someVar)?