54 lines
1.7 KiB
JavaScript
54 lines
1.7 KiB
JavaScript
/** PURE_IMPORTS_START tslib,_Subscriber PURE_IMPORTS_END */
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import * as tslib_1 from "tslib";
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import { Subscriber } from '../Subscriber';
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export function count(predicate) {
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return function (source) { return source.lift(new CountOperator(predicate, source)); };
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}
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var CountOperator = /*@__PURE__*/ (function () {
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function CountOperator(predicate, source) {
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this.predicate = predicate;
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this.source = source;
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}
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CountOperator.prototype.call = function (subscriber, source) {
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return source.subscribe(new CountSubscriber(subscriber, this.predicate, this.source));
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};
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return CountOperator;
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}());
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var CountSubscriber = /*@__PURE__*/ (function (_super) {
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tslib_1.__extends(CountSubscriber, _super);
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function CountSubscriber(destination, predicate, source) {
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var _this = _super.call(this, destination) || this;
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_this.predicate = predicate;
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_this.source = source;
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_this.count = 0;
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_this.index = 0;
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return _this;
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}
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CountSubscriber.prototype._next = function (value) {
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if (this.predicate) {
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this._tryPredicate(value);
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}
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else {
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this.count++;
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}
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};
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CountSubscriber.prototype._tryPredicate = function (value) {
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var result;
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try {
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result = this.predicate(value, this.index++, this.source);
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}
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catch (err) {
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this.destination.error(err);
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return;
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}
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if (result) {
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this.count++;
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}
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};
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CountSubscriber.prototype._complete = function () {
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this.destination.next(this.count);
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this.destination.complete();
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};
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return CountSubscriber;
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}(Subscriber));
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//# sourceMappingURL=count.js.map
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