for in vs for of javascript code example
Example 1: for of vs for in javascript
let list = [4, 5, 6];
for (let i in list) {
console.log(i);
}
for (let i of list) {
console.log(i);
}
let pets = new Set(["Cat", "Dog", "Hamster"]);
pets["species"] = "mammals";
for (let pet in pets) {
console.log(pet);
}
for (let pet of pets) {
console.log(pet);
}
Example 2: for in and for of in js
Object.prototype.objCustom = function () {};
Array.prototype.arrCustom = function () {};
let iterable = [3, 5, 7];
iterable.foo = "hello";
for (let i in iterable) {
console.log(i);
}
for (let i of iterable) {
console.log(i);
}
Example 3: for of and for in javascript
let arr = ['el1', 'el2', 'el3'];
arr.addedProp = 'arrProp';
for (let elKey in arr) {
console.log(elKey);
}
for (let elValue of arr) {
console.log(elValue)
}
Example 4: for of vs for in
for (variable in enumerable) {
}
Example 5: for of vs for in
const array = ['a', 'b', 'c', 'd'];
for (const index in array) {
console.log(array[index])
}