What are advanced iterables in TypeScript?

What are advanced iterables in TypeScript?

Advanced iterables in TypeScript refer to custom iterable objects that implement the iterable protocol, allowing for more complex data structures.

Can you give me an example of a custom iterable?

Sure! Here's a simple example of a custom iterable that generates a sequence of numbers:

class NumberSequence {
    private current: number = 0;
    constructor(private max: number) {}

    [Symbol.iterator]() {
        return this;
    }

    next() {
        if (this.current < this.max) {
            return { value: this.current++, done: false };
        } else {
            return { done: true };
        }
    }
}

const sequence = new NumberSequence(5);
for (const num of sequence) {
    console.log(num); // Outputs: 0, 1, 2, 3, 4
}

What are the benefits of using custom iterables?

Custom iterables provide flexibility in how data is accessed and manipulated, allowing for lazy evaluation and better memory management.

Can I use async iterables in TypeScript?

Yes, TypeScript supports async iterables, which allow you to work with asynchronous data streams using the for await...of syntax.