ix/iterable/defer.js

The Interactive Extensions for JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.defer = void 0;
const iterablex_js_1 = require("./iterablex.js");
class DeferIterable extends iterablex_js_1.IterableX {
    constructor(fn) {
        super();
        this._fn = fn;
    }
    *[Symbol.iterator]() {
        for (const item of this._fn()) {
            yield item;
        }
    }
}
/**
 * Returns an iterable sequence that invokes the specified factory function whenever a call to [Symbol.iterator] has been made.
 *
 * @template TSource The type of the elements in the sequence returned by the factory function, and in the resulting sequence.
 * @param {(() => Iterable<TSource>)} factory iterable factory function to invoke for each call to [Symbol.iterator].
 * @returns {AsyncIterableX<TSource>} An iterable sequence whose observers trigger an invocation of the given iterable factory function.
 */
function defer(factory) {
    return new DeferIterable(factory);
}
exports.defer = defer;

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