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- {"ast":null,"code":"import { Subscriber } from '../Subscriber';\nexport function count(predicate) {\n return source => source.lift(new CountOperator(predicate, source));\n}\nclass CountOperator {\n constructor(predicate, source) {\n this.predicate = predicate;\n this.source = source;\n }\n call(subscriber, source) {\n return source.subscribe(new CountSubscriber(subscriber, this.predicate, this.source));\n }\n}\nclass CountSubscriber extends Subscriber {\n constructor(destination, predicate, source) {\n super(destination);\n this.predicate = predicate;\n this.source = source;\n this.count = 0;\n this.index = 0;\n }\n _next(value) {\n if (this.predicate) {\n this._tryPredicate(value);\n } else {\n this.count++;\n }\n }\n _tryPredicate(value) {\n let result;\n try {\n result = this.predicate(value, this.index++, this.source);\n } catch (err) {\n this.destination.error(err);\n return;\n }\n if (result) {\n this.count++;\n }\n }\n _complete() {\n this.destination.next(this.count);\n this.destination.complete();\n }\n}\n//# sourceMappingURL=count.js.map","map":null,"metadata":{},"sourceType":"module","externalDependencies":[]}
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