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15 lines
504 B
JavaScript
15 lines
504 B
JavaScript
import { operate } from '../util/lift';
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import { createOperatorSubscriber } from './OperatorSubscriber';
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export function pairwise() {
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return operate(function (source, subscriber) {
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var prev;
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var hasPrev = false;
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source.subscribe(createOperatorSubscriber(subscriber, function (value) {
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var p = prev;
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prev = value;
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hasPrev && subscriber.next([p, value]);
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hasPrev = true;
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}));
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});
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}
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//# sourceMappingURL=pairwise.js.map
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