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for of vs for in

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shahul answered on October 11, 2020 Popularity 8/10 Helpfulness 5/10

answer for of vs for in

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for of vs for in

Comment

// for of
// used for arrays and strings
const array1 = ['a', 'b', 'c'];

for (const element of array1) {
  console.log(element);
}

// Expected output: "a"
// Expected output: "b"
// Expected output: "c"


// for in
// used for objects
const object = { a: 1, b: 2, c: 3 };

for (const property in object) {
  console.log(`${property}: ${object[property]}`);
}

// Expected output:
// "a: 1"
// "b: 2"
// "c: 3"

Popularity 8/10 Helpfulness 5/10 Language javascript

Source: developer.mozilla.org

Tags: javascript

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Contributed on Oct 24 2023

shahul

0 Answers Avg Quality 2/10

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for of vs for in javascript

Comment

let list = [4, 5, 6];

for (let i in list) {
   console.log(i); // "0", "1", "2",
}

for (let i of list) {
   console.log(i); // "4", "5", "6"
}

// EXAMPLE 2
let pets = new Set(["Cat", "Dog", "Hamster"]);
pets["species"] = "mammals";

for (let pet in pets) {
   console.log(pet); // "species"
}

for (let pet of pets) {
    console.log(pet); // "Cat", "Dog", "Hamster"
}

Popularity 10/10 Helpfulness 6/10 Language javascript

Source: stackoverflow.com

Tags: javascript j

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Contributed on Oct 11 2020

Frightened Fly

0 Answers Avg Quality 2/10

for in vs for of

Comment

/**
* for in loops over enumerable property names of an object.
* for of (new in ES6) does use an object-specific iterator and 
* loops over the values generated by that.
**/
const arr = [3, 5, 7];
    
for (const i in arr) {
  console.log(i); // logs "0", "1", "2", "foo"
}
    
for (const i of arr) {
  console.log(i); // logs "3", "5", "7"
}

Popularity 9/10 Helpfulness 4/10 Language javascript

Source: stackoverflow.com

Tags: javascript j

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Contributed on Sep 22 2022

Radguru

0 Answers Avg Quality 2/10

for in vs for of

Comment

for in loops over enumerable property names of an object.

for of (new in ES6) does use an object-specific iterator and loops over the values generated by that.

Popularity 9/10 Helpfulness 1/10 Language whatever

Source: stackoverflow.com

Tags: whatever whateve

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Contributed on Jul 26 2021

Thankful Teira

0 Answers Avg Quality 2/10

for of vs for in

Comment

for...in Loop => iterates over the index in the array.

for...of Loop => iterates over the object of objects.

Popularity 9/10 Helpfulness 1/10 Language whatever

Source: Grepper

Tags: whatever whateve

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Contributed on Jun 01 2022

Tarik

0 Answers Avg Quality 2/10

for of vs for in

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