javascript find matching elements in two arrays
const intersection = array1.filter(element => array2.includes(element));javascript find matching elements in two arrays
const intersection = array1.filter(element => array2.includes(element));comparing two arrays in javascript returning differences
function arrayDiff (a1, a2) {
var a = [], diff = [];
for (var i = 0; i < a1.length; i++) {
a[a1[i]] = true;
}
for (var i = 0; i < a2.length; i++) {
if (a[a2[i]]) {
delete a[a2[i]];
} else {
a[a2[i]] = true;
}
}
for (var k in a) {
diff.push(k);
}
return diff;
}
//usage:
console.log(arrayDiff(['red', 'white','green'], [ 'red','white', 'blue']));//["green", "blue"]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]);
}
}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;
}javascript find matching elements in two arrays
let firstArray = ["One", "Two", "Three", "Four", "Five"];
let secondArray = ["Three", "Four"];
let map = {};
firstArray.forEach(i => map[i] = false);
secondArray.forEach(i => map[i] === false && (map[i] = true));
let jsonArray = Object.keys(map).map(k => ({ name: k, matched: map[k] }));Copyright © 2021 Codeinu
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