iteragain/dist/esm/internal/RoundrobinIterator.js

Javascript Iterable/Iterator/Generator-function utilities.

export class RoundrobinIterator {
    constructor(iterators) {
        this.iterators = iterators;
        this.i = 0;
    }
    [Symbol.iterator]() {
        return this;
    }
    next(...args) {
        if (!this.iterators.length)
            return { done: true, value: undefined };
        const next = this.iterators[this.i].next(...args);
        if (next.done) {
            this.iterators.splice(this.i, 1);
            this.i %= this.iterators.length;
            return this.next(...args);
        }
        this.i = (this.i + 1) % this.iterators.length;
        return next;
    }
}
export default RoundrobinIterator;
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