12 lines
451 B
TypeScript
12 lines
451 B
TypeScript
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import { Observable } from '../Observable';
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/**
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* Returns a new observable that triggers on the second and following inputs.
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* An input that triggers an event will return an pair of [(N - 1)th, Nth].
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* The (N-1)th is stored in the internal state until Nth input occurs.
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*
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* <img src="./img/pairwise.png" width="100%">
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*
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* @returns {Observable<R>} an observable of pairs of values.
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*/
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export declare function pairwise<T>(): Observable<[T, T]>;
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