| import { Subscriber } from '../Subscriber'; |
| export function filter(predicate, thisArg) { |
| return function filterOperatorFunction(source) { |
| return source.lift(new FilterOperator(predicate, thisArg)); |
| }; |
| } |
| class FilterOperator { |
| constructor(predicate, thisArg) { |
| this.predicate = predicate; |
| this.thisArg = thisArg; |
| } |
| call(subscriber, source) { |
| return source.subscribe(new FilterSubscriber(subscriber, this.predicate, this.thisArg)); |
| } |
| } |
| class FilterSubscriber extends Subscriber { |
| constructor(destination, predicate, thisArg) { |
| super(destination); |
| this.predicate = predicate; |
| this.thisArg = thisArg; |
| this.count = 0; |
| } |
| _next(value) { |
| let result; |
| try { |
| result = this.predicate.call(this.thisArg, value, this.count++); |
| } |
| catch (err) { |
| this.destination.error(err); |
| return; |
| } |
| if (result) { |
| this.destination.next(value); |
| } |
| } |
| } |
| //# sourceMappingURL=filter.js.map |