@reactivex/ix-esnext-esm/iterable/defer.js

The Interactive Extensions for JavaScript

import { IterableX } from './iterablex';
class DeferIterable extends IterableX {
    constructor(fn) {
        super();
        this._fn = fn;
    }
    *[Symbol.iterator]() {
        for (const item of this._fn()) {
            yield item;
        }
    }
}
/**
 * Creates an enumerable sequence based on an iterable factory function.
 * @param {function(): Iterable<T>} factory Iterable factory function.
 * @return {Iterable<T>} Sequence that will invoke the iterable factory upon a call to [Symbol.iterator]().
 */
export function defer(factory) {
    return new DeferIterable(factory);
}

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