Clone a Set in JavaScript

This post will discuss how to clone a Set in JavaScript.

There are several methods to clone a set in JavaScript. A set is a data structure that stores unique values of any type. Cloning a set means creating a new set that contains the same elements as the original set. Here are some of the methods we can use:

1. Using Set Constructor

This is the simplest and most common way to clone a set. We can use the Set constructor to clone a set by passing the original set as an argument. This will create a new set object with the same values as the original set. This function performs a shallow clone, which means that if the original set contains objects, they will be copied by reference, not by value. For instance:

// Create a new set using the Set constructor

let originalSet = new Set([1, 'two', true]);

// Clone the set using the Set constructor

let clonedSet = new Set(originalSet);

// The clonedSet is a new set that contains the same elements as originalSet

console.log(clonedSet); // Set(3) { 1, 'two', true }

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2. Using Lodash or Underscore.js

Alternatively, we can clone a set using Lodash or Underscore.js using their clone() function. This function creates a shallow copy of an object, such as a set. A shallow copy means that only the top-level properties are copied, and any nested objects or arrays are shared between the original and the copy. For instance:

// Import Lodash module

const _ = require("lodash");

// Create a new set using the Set constructor

let originalSet = new Set([1, 'two', true]);

// Shallow clone the set using Lodash's or Underscore's clone function

let clonedSet = _.clone(originalSet);

// The clonedSet is a new set that contains the same elements as originalSet

console.log(clonedSet); // Set { 1, 5, 'some text' }

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To create a deep copy using Lodash, we can use its cloneDeep() function, that recursively copies everything in the original set to the new set. A deep copy means that all nested objects or arrays are copied and not shared between the original and the copy. For instance:

// Import Lodash module

const _ = require("lodash");

// Create a new set using the Set constructor

let originalSet = new Set([1, 'two', [1, 2, 3]]);

// Deep clone the set using Lodash's or Underscore's cloneDeep function

let clonedSet = _.cloneDeep(originalSet);

// The clonedSet is a new set that contains the same elements as originalSet

console.log(clonedSet); // Set(3) { 1, 'two', [ 1, 2, 3 ] }

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That’s all about cloning a Set in JavaScript.

1. Using Set Constructor

2. Using Lodash or Underscore.js

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