js set to array - Brave Search

JavaScript Array to Set

stackoverflow.com › questions › 28965112 › javascript-array-to-set

Just pass the array to the Set constructor. The Set constructor accepts an iterable parameter. The Array object implements the iterable protocol, so its a valid parameter.

var arr = [55, 44, 65];
var set = new Set(arr);
console.log(set.size === arr.length);
console.log(set.has(65));

See here

Answer from levi on Stack Overflow

developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › Set

Set - JavaScript - MDN Web Docs

js · const myArray = ["value1", "value2", "value3"]; // Use the regular Set constructor to transform an Array into a Set const mySet = new Set(myArray); mySet.has("value1"); // returns true // Use the spread syntax to transform a set into an Array. console.log([...mySet]); // Will show you ...

stackoverflow.com › questions › 28965112 › javascript-array-to-set

JavaScript Array to Set - Stack Overflow

Just pass the array to the Set constructor. The Set constructor accepts an iterable parameter. The Array object implements the iterable protocol, so its a valid parameter.

var arr = [55, 44, 65];
var set = new Set(arr);
console.log(set.size === arr.length);
console.log(set.has(65));

See here

If you start out with:

let array = [
    {name: "malcom", dogType: "four-legged"},
    {name: "peabody", dogType: "three-legged"},
    {name: "pablo", dogType: "two-legged"}
];

And you want a set of, say, names, you would do:

let namesSet = new Set(array.map(item => item.name));

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stackoverflow.com › questions › 20069828 › how-to-convert-set-to-array

How to convert Set to Array?

if no such option exists, then maybe there is a nice idiomatic one-liner for doing that ? like, using for...of, or similar ?

Indeed, there are several ways to convert a Set to an Array:

Using Array.from:

Note: safer for TypeScript.

const array = Array.from(mySet);

Simply spreading the Set out in an array:

Note: Spreading a Set has issues when compiled with TypeScript (See issue #8856). It's safer to use Array.from above instead.

const array = [...mySet];

The old-fashioned way, iterating and pushing to a new array (Sets do have forEach):

const array = [];
mySet.forEach(v => array.push(v));

via https://speakerdeck.com/anguscroll/es6-uncensored by Angus Croll

It turns out, we can use spread operator:

var myArr = [...mySet];

Or, alternatively, use Array.from:

var myArr = Array.from(mySet);

geeksforgeeks.org › javascript › how-to-convert-set-to-array-in-javascript

Set to Array in JS or JavaScript - GeeksforGeeks

July 11, 2025 - It takes the set as parameter and converts it to an array.

developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › Array › from

Array.from() - JavaScript - MDN Web Docs

An iterable or array-like object to convert to an array.

developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › TypedArray › set

TypedArray.prototype.set() - JavaScript - MDN Web Docs

July 10, 2025 - js · set(array) set(array, targetOffset) set(typedarray) set(typedarray, targetOffset) array · The array from which to copy values.

justacademy.co › blog-detail › how-to-convert-set-to-array-in-javascript

How To Convert Set To Array In JavaScript

April 23, 2024 - 9) Understand that sets are ordered collections of unique elements, while arrays are ordered collections of elements with indices. 10) After converting a set to an array, you can perform array specific methods and operations on the array.

medium.com › @conboys111 › how-to-easily-convert-a-set-to-an-array-and-vice-versa-in-javascript-a4e28ac9ccef

How to Easily Convert a Set to an Array and Vice Versa in JavaScript | by myHotTake | Medium

November 4, 2024 - But what if I need to pack up my exhibit and return the artifacts to storage, while preserving the order and keeping everything (even duplicates) in my storage room? This is where the magic happens. I can easily convert my Set back into an Array, almost like unfolding the artifacts from the display case and putting them back into storage, but now the order might matter.

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w3schools.com › js › js_sets.asp

JavaScript Sets

JSON Intro JSON Syntax JSON vs XML JSON Data Types JSON Parse JSON Stringify JSON Objects JSON Arrays JSON Server JSON PHP JSON HTML JSON JSONP JS jQuery · jQuery Selectors jQuery HTML jQuery CSS jQuery DOM JS Graphics · JS Graphics JS Canvas JS Plotly JS Chart.js JS Google Chart JS D3.js JS Examples · JS Examples JS HTML DOM JS HTML Input JS HTML Objects JS HTML Events JS Browser JS Editor JS Exercises JS Quiz JS Website JS Syllabus JS Study Plan JS Interview Prep JS Bootcamp JS Certificate JS Reference ... A JavaScript Set is a collection of unique values.

scaler.com › home › topics › how to convert set to array in javascript

How to Convert Set to Array in JavaScript - Scaler Topics

May 4, 2023 - Explanation: We only gave an iterable object as a parameter to the Array.from() method. The method creates a new instance of the array and converts the iterable into an array. ... The Spread operator can also be used to turn the set into an array.

masteringjs.io › tutorials › fundamentals › set-to-array

Convert a Set to an Array in JavaScript - Mastering JS

July 10, 2025 - const set = new Set(['a', 'b', 'c']); Array.from(set); // ['a', 'b', 'c'] Array.from(set).map(c => c.toUpperCase()); // ['A', 'B', 'C']

w3docs.com › javascript

How to Convert Set to Array in JavaScript

const set = new Set(['welcome', 'to', 'W3docs']); console.log(Array.from(set));

medium.com › front-end-weekly › es6-set-vs-array-what-and-when-efc055655e1a

ES6 — Set vs Array — What and when? | by Maya Shavin | Frontend Weekly | Medium

November 9, 2018 - Yup, by definition, Array and Set are technically different concepts. One of the biggest differences here, you may notice, is that elements in Array can be duplicate (unless you tell it not to be), and in Set, they just can’t (regardless what you decide).

favtutor.com › articles › set-to-array-javascript

Convert Set to Array in JavaScript (3 Easy Methods)

November 14, 2023 - To create a set from an array, simply make a set with desired elements. Use the spread operator (…) followed by the Set name inside square brackets to spread the elements into a new Array. Finally, store the array in a new variable.

greatfrontend.com › questions › quiz › how-do-you-convert-a-set-to-an-array-in-javascript

How do you convert a `Set` to an array in JavaScript? | Quiz Interview Questions with Solutions

September 5, 2021 - To convert a Set to an array in JavaScript, you can use the Array.from() method or the spread operator.

delftstack.com › home › howto › javascript › convert set to array

How to Convert Set to Array in JavaScript | Delft Stack

March 11, 2025 - One of the most elegant and straightforward ways to convert a Set to an Array in JavaScript is by using the spread operator (...). This operator allows you to take the elements of the Set and spread them into a new Array.

w3schools.com › js › js_arrays.asp

JavaScript Arrays

It is a common practice to declare arrays with the const keyword. Learn more about const with arrays in the chapter: JS Array Const.

community.latenode.com › other questions › javascript

How can I turn a Set into an Array? - JavaScript

October 11, 2024 - A Set is an effective way to maintain Arrays with unique values, but accessing properties from a Set is limited, usually involving the somewhat cumbersome mySet.values().next(). It would be fine if methods like map coul…

bobbyhadz.com › blog › javascript-convert-array-to-set

How to Convert an Array to a Set in JavaScript | bobbyhadz

May 10, 2025 - Use the Array.map() method to iterate over the array. On each iteration, access a specific property and return its value. Use the Set() constructor to convert the array to a Set object.

geeksforgeeks.org › javascript › set-vs-array-in-javascript

Set vs Array in JavaScript - GeeksforGeeks

August 5, 2025 - Sets are used to store collections of unique value without allowing duplication. The set is similar to the array and supports both insertion and deletion methods of the array.