What does the !! (double exclamation mark) operator do in …
The == and != operators do type coercion before comparing. This is bad because it causes ' \t\r\n' == 0 to be true. This can mask type errors. JSLint cannot reliably determine if == is being used …
Which equals operator (== vs ===) should be used in JavaScript ...
Dec 11, 2008 · JavaScript has two sets of equality operators: === and !==, and their evil twins == and !=. The good ones work the way you would expect. If the two operands are of the same …
How do you use the ? : (conditional) operator in JavaScript?
Jun 7, 2011 · If you see any more funny symbols in JavaScript, you should try looking up JavaScript's operators first: Mozilla Developer Center's list of operators. The one exception …
javascript - What is the difference between the `=` and `==` …
I would check out CodeCademy for a quick intro to JavaScript. If you prefer to read more, MDN is a great intro as well. For those concerned about the source of the term "identity operator" …
JavaScript comparison operators: Identity vs. Equality
Aug 9, 2016 · I've been trying to understand the difference between JavaScript's comparison operators: identity and equality. From what I've read, if you check the equality of two objects …
Is there a "null coalescing" operator in JavaScript?
Jan 25, 2009 · beware of the JavaScript specific definition of null. there are two definitions for "no value" in javascript. 1. Null: when a variable is null, it means it contains no data in it, but the …
operators - What do ">>" and "<<" mean in Javascript? - Stack …
Aug 9, 2011 · These are the shift right and shift left operators. Essentially, these operators are used to manipulate values at BIT-level. They are typically used along with the the & (bitwise …
comparison operators - Difference between == and === in …
Feb 7, 2009 · === and !== are strict comparison operators: JavaScript has both strict and type-converting equality comparison. For strict equality the objects being compared must have the …
What is the JavaScript >>> operator and how do you use it?
Although JavaScript's Numbers are double-precision floats(*), the bitwise operators (<<, >>, &, | and ~) are defined in terms of operations on 32-bit integers. Doing a bitwise operation …
What's the difference between & and && in JavaScript?
@Bludream: The explanation in this answer is wrong. You do not use bitwise operators for logical (boolean) comparisons. You use logical (boolean) operators. They do different (although …