@reactivex/rxjs/dist/amd/observable/ArrayLikeObservable.js

Reactive Extensions for modern JavaScript

var __extends = (this && this.__extends) || function (d, b) {
    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
    function __() { this.constructor = d; }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
define(["require", "exports", '../Observable', './ScalarObservable', './EmptyObservable'], function (require, exports, Observable_1, ScalarObservable_1, EmptyObservable_1) {
    "use strict";
    /**
     * We need this JSDoc comment for affecting ESDoc.
     * @extends {Ignored}
     * @hide true
     */
    var ArrayLikeObservable = (function (_super) {
        __extends(ArrayLikeObservable, _super);
        function ArrayLikeObservable(arrayLike, mapFn, thisArg, scheduler) {
            _super.call(this);
            this.arrayLike = arrayLike;
            this.scheduler = scheduler;
            if (!mapFn && !scheduler && arrayLike.length === 1) {
                this._isScalar = true;
                this.value = arrayLike[0];
            }
            if (mapFn) {
                this.mapFn = mapFn.bind(thisArg);
            }
        }
        ArrayLikeObservable.create = function (arrayLike, mapFn, thisArg, scheduler) {
            var length = arrayLike.length;
            if (length === 0) {
                return new EmptyObservable_1.EmptyObservable();
            }
            else if (length === 1 && !mapFn) {
                return new ScalarObservable_1.ScalarObservable(arrayLike[0], scheduler);
            }
            else {
                return new ArrayLikeObservable(arrayLike, mapFn, thisArg, scheduler);
            }
        };
        ArrayLikeObservable.dispatch = function (state) {
            var arrayLike = state.arrayLike, index = state.index, length = state.length, mapFn = state.mapFn, subscriber = state.subscriber;
            if (subscriber.isUnsubscribed) {
                return;
            }
            if (index >= length) {
                subscriber.complete();
                return;
            }
            var result = mapFn ? mapFn(arrayLike[index], index) : arrayLike[index];
            subscriber.next(result);
            state.index = index + 1;
            this.schedule(state);
        };
        ArrayLikeObservable.prototype._subscribe = function (subscriber) {
            var index = 0;
            var _a = this, arrayLike = _a.arrayLike, mapFn = _a.mapFn, scheduler = _a.scheduler;
            var length = arrayLike.length;
            if (scheduler) {
                return scheduler.schedule(ArrayLikeObservable.dispatch, 0, {
                    arrayLike: arrayLike, index: index, length: length, mapFn: mapFn, subscriber: subscriber
                });
            }
            else {
                for (var i = 0; i < length && !subscriber.isUnsubscribed; i++) {
                    var result = mapFn ? mapFn(arrayLike[i], i) : arrayLike[i];
                    subscriber.next(result);
                }
                subscriber.complete();
            }
        };
        return ArrayLikeObservable;
    }(Observable_1.Observable));
    exports.ArrayLikeObservable = ArrayLikeObservable;
});
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