JAVASCRIPT

js compare values of two arrays

const a = ['Left', 'Right'];
const b = ['Right', 'Left'];

//	true if a and b contain the same values
//	false otherwise
const c = a.sort().join(',') === b.sort().join(',');

js compare elements of two arrays

var array1 = ["cat", "sum","fun", "run", "hut"];
var array2 = ["bat", "cat","dog","sun", "hut", "gut"];

console.log(array1.diff(array2));

comparing two arrays in javascript

const arr1 = [1, 2, 3];
const arr2 = [1, 3, 3];

if (arr1.length !== arr2.length) return console.log("false");
for (let i = 0; i < arr1.length; i++) {
    for (let j = 0; j < arr2.length; j++) {
        if (arr1[i] === arr2[j]) {
            console.log("yes match", arr1[i], arr2[j]);
            continue;
        }
        console.log("no match", arr1[i], arr2[j]);
    }
}

compare two array in javascript

let arr1 = [1, 4, 7, 4, 2, 3];
let arr2 = [1, 2, 3, 4, 7, 18];

const is_same = arr1.length == arr2.length &&
  (arr1.every((currElem)=>{
    if(arr2.indexOf(currElem)> -1){
      return (currElem == arr2[arr2.indexOf(currElem)]);
    }return false
  })
)
console.log(is_same)

how to compare two arrays javascript

function arraysAreIdentical(arr1, arr2){
    if (arr1.length !== arr2.length) return false;
    for (var i = 0, len = arr1.length; i < len; i++){
        if (arr1[i] !== arr2[i]){
            return false;
        }
    }
    return true; 
}

compare between two arrays javascript

const equals = (a, b) => JSON.stringify(a) === JSON.stringify(b);
let arr1 = ['1','2'];
let arr2 = ['1','2'];
equals(arr1,arr2)//this return false , if not equal then its return false

javascript:compare two arrays and returns match

function select(arr, obj) {
  const result = {};
  for (let name of arr) {
    if (name in obj) {
      result[name] = obj[name];
    }
  }
  return result;
}