63 lines
2.1 KiB
JavaScript
63 lines
2.1 KiB
JavaScript
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"use strict";
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var __extends = (this && this.__extends) || (function () {
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var extendStatics = function (d, b) {
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extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
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return extendStatics(d, b);
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}
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return function (d, b) {
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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Object.defineProperty(exports, "__esModule", { value: true });
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var Subscriber_1 = require("../Subscriber");
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var ArgumentOutOfRangeError_1 = require("../util/ArgumentOutOfRangeError");
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var empty_1 = require("../observable/empty");
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function take(count) {
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return function (source) {
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if (count === 0) {
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return empty_1.empty();
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}
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else {
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return source.lift(new TakeOperator(count));
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}
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};
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}
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exports.take = take;
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var TakeOperator = (function () {
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function TakeOperator(total) {
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this.total = total;
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if (this.total < 0) {
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throw new ArgumentOutOfRangeError_1.ArgumentOutOfRangeError;
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}
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}
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TakeOperator.prototype.call = function (subscriber, source) {
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return source.subscribe(new TakeSubscriber(subscriber, this.total));
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};
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return TakeOperator;
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}());
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var TakeSubscriber = (function (_super) {
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__extends(TakeSubscriber, _super);
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function TakeSubscriber(destination, total) {
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var _this = _super.call(this, destination) || this;
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_this.total = total;
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_this.count = 0;
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return _this;
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}
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TakeSubscriber.prototype._next = function (value) {
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var total = this.total;
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var count = ++this.count;
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if (count <= total) {
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this.destination.next(value);
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if (count === total) {
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this.destination.complete();
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this.unsubscribe();
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}
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}
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};
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return TakeSubscriber;
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}(Subscriber_1.Subscriber));
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//# sourceMappingURL=take.js.map
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