CODEWITHSUNDEEP
javascriptiteratorecmascript-6
Jeanluca Scaljeri
Jeanluca Scaljeri

Reputation: 29129

How to create an iterator within a class

For a ES2015 js class I would like to have an iterator. So I tried the following

export default class MyList {
    iterator* () {
        // Dummy implementation
        let counter = 0;
        while(true) {
            yield counter++;
        }
    }
}

Because I would like to do

let list = new MyList();
    iter = list.iterator();

while(!iter.done()) { ... }

For example.

However, this doesn't work. So the question is, what is the preferred way to implement an iterator inside a class ?

Upvotes: 1

Views: 543

Answers (1)

Azamantes
Azamantes

Reputation: 1451

The '*' should be before function name. Like this:

export default class MyList {
    *iterator() {
        // Dummy implementation
        let counter = 0;
        while(true) {
            yield counter++;
        }
    }
}

You're welcome.

Upvotes: 5

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