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javascript - When should I use ?? (nullish coalescing) vs || (logical ...
) in JavaScript only considers null or undefined as "nullish" values. If the left-hand side is any other value, even falsy values like "" (empty string), 0 , or false , it will not use the right-hand side:
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. The good ones work the way you …
How do you use the ? : (conditional) operator in JavaScript?
Jun 7, 2011 · It's a little hard to google when all you have are symbols ;) The terms to use are "JavaScript conditional operator". If you see any more funny symbols in JavaScript, you should …
What does the !! (double exclamation mark) operator do in …
A third use is to produce logical XOR and logical XNOR. In both C and JavaScript, a && b performs a logical AND (true if both sides are true), and a & b performs a bitwise AND. a || b …
JavaScript OR (||) variable assignment explanation - Stack Overflow
That is, JavaScript "short-circuits" the evaluation of Boolean operators and will return the value associated with either the first non-false variable value or whatever the last variable contains. …
Is there a "null coalescing" operator in JavaScript?
Jan 25, 2009 · After reading your clarification, @Ates Goral's answer provides how to perform the same operation you're doing in C# in JavaScript. @Gumbo's answer provides the best way to …
What's the meaning of "=>" (a fat arrow formed from equal and …
Jun 20, 2017 · JavaScript arrow functions are roughly the equivalent of lambda functions in python or blocks in Ruby. These are anonymous functions with their own special syntax and operate …
How can I use modulo operator (%) in JavaScript? [duplicate]
having trouble to understand JavaScript 100%3 and answer comes out 1 in console. 0. loop popup confusion.
What is the meaning of "$" sign in JavaScript - Stack Overflow
May 25, 2018 · JavaScript allows upper- and lower-case letters (in a wide variety of scripts, not just English), numbers (but not at the first character), $, _, and others.¹ Prototype, jQuery, and …
What do ">>" and "<<" mean in Javascript? - Stack Overflow
Aug 9, 2011 · Not that these convert the numbers into Int32 -- while nearly everything else in javascript works on 64-bit doubles. – Sean McMillan Commented Aug 9, 2011 at 15:33