Boolean Logic Regarding empty arrays.

Question

quick question:

why does this return false? Just curious.


    var myArray = [];
    var myArray1 = new Array();
    console.log(myArray === myArray1)

both are different array... in different location reference – Pranav C Balan Jul 16 '16 at 17:09 — Pranav C Balan, Jul 16 '16 at 17:09

score 2 · Accepted Answer · answered Jul 16 '16 at 17:09

2

Two distinct objects are never === to one another (nor are they ==, for that matter). Object equality means that the two objects are really just one object; that is, that both sides of the === operator are references to the exact same object.

So, this will give you true:

var a = [], b = a;
console.log(a === b);

answered Jul 16 '16 at 17:09

Pointy

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Bro! The stuff wont work even if you do a == check, as they are separate instance. Correct me if am missing something. – Ayan Jul 16 '16 at 17:11
2

Pointy has said that _"nor are they ==, for that matter"_ – Rayon Jul 16 '16 at 17:13

score 0 · Answer 2 · answered Jul 16 '16 at 17:09

0

Every time you do

new Array() or
= []

A new instance of the Array constructor is assigned to the variable. So when you do a equality check they aint same. Just as same as when two instance of a class aint same.

answered Jul 16 '16 at 17:09

Ayan

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Boolean Logic Regarding empty arrays.

2 Answers2