JS Junction

Basics

JS Sets

Working with JavaScript Sets

JavaScript Sets store unique values, with methods like add and has.

Introduction to JavaScript Sets

JavaScript Sets are a part of ES6 and offer a way to store unique values of any type, whether primitive values or object references. They are similar to arrays but come with additional benefits when dealing with unique data.

Creating a Set

You can create a Set using the Set constructor. Initially, you may initialize it as empty or with an iterable object.

Adding Values to a Set

To add values to a Set, use the add() method. Remember, a Set automatically ignores duplicate values.

Checking for Values

Use the has() method to check if a value exists in a Set. It returns true if the value is present, and false otherwise.

Removing Values from a Set

To remove an item from a Set, use the delete() method. The method returns true if the item was successfully removed, and false if the item was not found.

Iterating Over a Set

Sets are iterable, meaning you can loop through the elements using various methods, such as forEach() or a for...of loop.

Conclusion

JavaScript Sets provide a useful way to store unique values and perform operations like adding, checking, and removing elements efficiently. Understanding Sets is an essential skill for managing collections of data effectively in JavaScript.

Basics

Next
Maps