array and array compare

1Array.prototype.equals = function(arr2) {
2  return (
3    this.length === arr2.length &&
4    this.every((value, index) => value === arr2[index])
5  );
6};
7
8[1, 2, 3].equals([1, 2, 3]);	// true
9[1, 2, 3].equals([3, 6, 4, 2]);	// false

1// To compare arrays (or any other object):
2// Simple Array Example:
3const array1 = ['potato', 'banana', 'soup']
4const array2 = ['potato', 'orange', 'soup']
5
6array1 === array2;
7// Returns false due to referential equality
8JSON.stringify(array1) === JSON.stringify(array2);
9// Returns true 
10
11
12// Another Example:
13const deepArray1 = [{test: 'dummy'}, [['woo', 'ya'], 'weird']]
14const deepArray2 = [{test: 'dummy'}, [['woo', 'ya'], 'weird']]
15
16deepArray1 === deepArray2;
17// Returns false due to referential equality
18JSON.stringify(deepArray1) === JSON.stringify(deepArray2);
19// Returns true
20
21

1var array1 = [4,8,9,10];
2var array2 = [4,8,9,10];
3