{"ast":null,"code":"import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function filter(predicate, thisArg) {\n  return operate((source, subscriber) => {\n    let index = 0;\n    source.subscribe(new OperatorSubscriber(subscriber, value => predicate.call(thisArg, value, index++) && subscriber.next(value)));\n  });\n} //# sourceMappingURL=filter.js.map","map":null,"metadata":{},"sourceType":"module"}