Difference between == and === in JavaScript
665
Which equals operator (== vs ===) should be used in JavaScript comparisons?
32293
What's the difference between if(!$variable) and if(isset($variable))?
59231
What is the " := " operator in (VB).NET or what is it good for?
92055
In JavaScript, why is "0" equal to false, but when tested by 'if' it is not false by itself?
110074
What is the difference between == and equals() in Java?
84802
What is the difference between <%: and <%= in ASP.NET MVC?
24465
What does = +_ mean in JavaScript
115437
Javascript || operator
4772
Difference between "not equal" operators  and != in PHP
12091
Are if else statement equivalent to logical and && or || and where should I prefer one over the other?
32226
What does "options = options || {}" mean in Javascript?
120580
What does "=>" mean in PHP?
43716
Difference between string object and string literal
73430
C# .Equals(), .ReferenceEquals() and == operator
152371
equals vs Arrays.equals in Java
35549
What is the difference between the | and || or operators?
40674
What is the difference between null and undefined in JavaScript?