18 lines
811 B
JavaScript
18 lines
811 B
JavaScript
import { operate } from '../util/lift';
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import { createOperatorSubscriber } from './OperatorSubscriber';
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import { noop } from '../util/noop';
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import { innerFrom } from '../observable/innerFrom';
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export function distinct(keySelector, flushes) {
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return operate(function (source, subscriber) {
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var distinctKeys = new Set();
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source.subscribe(createOperatorSubscriber(subscriber, function (value) {
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var key = keySelector ? keySelector(value) : value;
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if (!distinctKeys.has(key)) {
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distinctKeys.add(key);
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subscriber.next(value);
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}
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}));
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flushes && innerFrom(flushes).subscribe(createOperatorSubscriber(subscriber, function () { return distinctKeys.clear(); }, noop));
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});
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}
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//# sourceMappingURL=distinct.js.map
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