Working with Sets in TypeScript

Working with Sets in TypeScript

Sets are a powerful data type that can be used to store and manipulate data in TypeScript. With a Set, you can easily add, remove, check for inclusion, and create intersections of different data types. Let’s look at how we can use sets in TypeScript.

Creating a Set

Creating a set is easy using the constructor syntax:

let mySet = new Set();

You can also create a set with an initial set of values:

let mySet = new Set([1, 2, 3]);

Adding and Removing Elements

You can use the add() and delete() methods to modify the set:

mySet.add(4);
mySet.delete(1);

Checking Inclusion in the Set

The has() method checks if a given element is included in the set:

mySet.has(3); // returns true

Intersection of Sets

Using the intersect() method, you can create a new set from the intersection of two sets:

let mySetA = new Set([1, 2, 3]);
let mySetB = new Set([2, 3, 4]);

let result = mySetA.intersect(mySetB);
// result is {2, 3}

Conclusion

We looked at how we can use sets in TypeScript to store and manipulate data. We outlined some basic operations such as adding and removing elements, checking inclusion, and intersecting two sets. With these techniques, you should now have the tools to work with sets in TypeScript.