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