A few weeks ago, I have read this thread Is < faster than <=? about comparison operators in C. It was said that there is no difference in the performance between < and <= as they are interpreted as same/similar machine commands.  At the s...
I'm trying to use the new (ES6) Map objects in order to represent a map between properties and a value.  I have objects in a form similar to:   {key1:value1_1,key2:value2_1},..... {key1:value1_N,key2:value2_N}   I want to group them based on both...
[Edit]  The general question seems incredibly hard to solve. Here is a significantly restricted version of this question.    How do I determine equality of functions?  lets say we have  function f() {     // black box code. }  function g() {     // b...
From: http://www.2ality.com/2011/12/strict-equality-exemptions.html     JavaScript has two operators for determining whether two values are equal:          The strict equality operator === only considers values equal that have the same type.    The ...
If I try something such as this:  $(".foo") === $(".foo") // = false   ... I get false. If I instead try this query,  $(".foo").get(0) === $(".foo").get(0) // = true   ... I get true.  That's because:  {a:myObject}...
I understand that to compare two strings for equality, the interpreter has to iterate through both strings and compare each character.   That would make the time complexity 0(n) where n is the length of the shortest string.  However, comparing two nu...
I had been going through the ES6 assuming that it would be easy to switch to EcmaScript 2017.  While going through, I got confused about this code  function f (x, y = 7, z = 42) {     return x + y + z } f(1) === 50   Which has ES5 equivalent   functi...
I need to compare two numeric values for equality in Javascript. The values may be NaN as well. I've come up with this code:  if (val1 == val2 || isNaN(val1) && isNaN(val2)) ...   which is working fine, but it looks bloated to me. I would...

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