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import { ObservableInputTuple, OperatorFunction, Cons } from '../types';
import { zip } from './zip';
/**
* Subscribes to the source, and the observable inputs provided as arguments, and combines their values, by index, into arrays.
*
* What is meant by "combine by index": The first value from each will be made into a single array, then emitted,
* then the second value from each will be combined into a single array and emitted, then the third value
* from each will be combined into a single array and emitted, and so on.
*
* This will continue until it is no longer able to combine values of the same index into an array.
*
* After the last value from any one completed source is emitted in an array, the resulting observable will complete,
* as there is no way to continue "zipping" values together by index.
*
* Use-cases for this operator are limited. There are memory concerns if one of the streams is emitting
* values at a much faster rate than the others. Usage should likely be limited to streams that emit
* at a similar pace, or finite streams of known length.
*
* In many cases, authors want `combineLatestWith` and not `zipWith`.
*
* @param otherInputs other observable inputs to collate values from.
* @return A function that returns an Observable that emits items by index
* combined from the source Observable and provided Observables, in form of an
* array.
*/
export function zipWith<T, A extends readonly unknown[]>(...otherInputs: [...ObservableInputTuple<A>]): OperatorFunction<T, Cons<T, A>> {
return zip(...otherInputs);
}