How can I use for...of loops with Sets in JavaScript?

How can I use for...of loops with Sets in JavaScript?

You can use for...of loops to iterate over the values in a Set. Here's a simple example:

const mySet = new Set(['apple', 'banana', 'orange']);
for (const fruit of mySet) {
    console.log(fruit);
}

This will log each fruit in the Set.

What happens if I try to use forEach with a Set?

You can use forEach with a Set as well! It works similarly to arrays. Here's how:

mySet.forEach(fruit => {
    console.log(fruit);
});

This will also log each fruit in the Set.

Are there any differences between for...of and forEach?

Yes, there are a few differences. For...of can be used with any iterable, while forEach is specific to arrays and Sets. Additionally, for...of allows you to use break and continue statements, while forEach does not.

Can I use for...of to get the keys of a Map?

Yes, you can! You would use for...of with the Map's keys() method. Here's an example:

const myMap = new Map();
myMap.set('a', 1);
myMap.set('b', 2);
for (const key of myMap.keys()) {
    console.log(key);
}

This will log 'a' and 'b'.