compare two arrays javascript To compare arrays, loop through them and compare every value: Arrays are objects in JavaScript, so the triple equals operator === only returns true if the arrays are the same reference.
compare two arrays javascript
Find the difference between two arrays in JavaScript Using Array.prototype.filter() function, Using jQuery, Using Underscore/Lodash Library,
1. Using Array.prototype.filter() function
indexOf() method
var website_str = [ 1, 2, 3, 4, 5 ]; var old_website = [ 4, 5, 6 ]; var results = website_str.filter(x => old_website.indexOf(x) === -1); console.log(results);
Equality comparison
const a = [1, 2, 3]; const b = [1, 2, 3]; a === b; // false
using JSON.stringify
const equals = (a, b) => JSON.stringify(a) === JSON.stringify(b); const a = [1, 2, 3]; const b = [1, 2, 3]; equals(a, b); // true
Using jQuery
Example 1
const { JSDOM } = require("jsdom");
const { window } = new JSDOM();
var $ = require("jquery")(window);
var website_str = [ 1, 2, 3, 4, 5 ];
var old_website = [ 4, 5, 6 ];
var results = $(website_str).not(old_website).get();
console.log(results);
Example 2
const { JSDOM } = require("jsdom");
const { window } = new JSDOM();
var $ = require("jquery")(window);
var website_str = [ 1, 2, 3, 4, 5 ];
var old_website = [ 4, 5, 6 ];
var results = $.grep(website_str, (item) => $.inArray(item, old_website) === -1);
console.log(results);
JavaScript Program to Compare Elements of Two Arrays
program to compare two arrays: Compare Arrays Using JSON.stringify()
function diffcomparedata(love_point, trust_points) {
const result = JSON.stringify(love_point) == JSON.stringify(trust_points)
if(result) {
console.log('The arrays have the same elements.');
}
else {
console.log('The arrays have different elements.');
}
}
const love_point = [1, 3, 5, 8];
const trust_points = [1, 3, 5, 8];
diffcomparedata(love_point, trust_points);
Compare Arrays using for Loop
program to extract value as an array from an array of objects
function diffcomparedata(love_point, trust_points) {
if(love_point.length != trust_points.length) {
return false;
}
else {
let result = false;
for(let i=0; i
Using Underscore/Lodash Library
Example
var _ = require('underscore');
var love_point = [ 1, 2, 3, 4, 5 ];
var trust_points = [ 4, 5, 6 ];
var results = _.difference(love_point, trust_points);
console.log(results);
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