How to find Intersection of Two Sets in JavaScript - Step by Step Examples

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How to find Intersection of Two Sets in JavaScript ?

Answer

To find the intersection of two sets in JavaScript, you can use the Set object and the filter method.

✐ Examples

1 Find Intersection of Two Sets using Set and filter Method

In this example,

We create two sets named set1 and set2.
We use the filter method on set1 to keep only the elements that are present in set2.

JavaScript Program

let set1 = new Set([1, 2, 3, 4, 5]);
let set2 = new Set([4, 5, 6, 7, 8]);
let intersection = new Set([...set1].filter(x => set2.has(x)));
console.log('Intersection:', intersection);

Output

Intersection: Set(2) { 4, 5 }

2 Find Intersection of Two Sets using for...of Loop

In this example,

We create two sets named set1 and set2.
We iterate through set1 using a for...of loop and add elements that are present in set2 to a new set named intersection.

JavaScript Program

let set1 = new Set([1, 2, 3, 4, 5]);
let set2 = new Set([4, 5, 6, 7, 8]);
let intersection = new Set();
for (let item of set1) {
    if (set2.has(item)) {
        intersection.add(item);
    }
}
console.log('Intersection:', intersection);

Output

Intersection: Set(2) { 4, 5 }

Summary

In this tutorial, we learned How to find Intersection of Two Sets in JavaScript language with well detailed examples.

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How to find Intersection of Two Sets in JavaScript - Step by Step Examples

How to find Intersection of Two Sets in JavaScript ?

Answer

✐ Examples

1 Find Intersection of Two Sets using Set and filter Method

JavaScript Program

Output

2 Find Intersection of Two Sets using for...of Loop

JavaScript Program

Output

Summary

More JavaScript Sets Tutorials