@effect-ts/system
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Effect-TS is a zero dependency set of libraries to write highly productive, purely functional TypeScript at scale.
17 lines (16 loc) • 586 B
JavaScript
// ets_tracing: off
import * as Tp from "../../../Collections/Immutable/Tuple/index.mjs";
import * as Fold from "./fold.mjs";
import * as Map from "./map.mjs";
/**
* Creates a sink that folds elements of type `In` into a structure
* of type `S` until `max` elements have been folded.
*
* Like `foldWeighted`, but with a constant cost function of 1.
*/
export function foldUntil(z, max, f) {
return Map.map_(Fold.fold(Tp.tuple(z, 0), _ => Tp.get_(_, 1) < max, ({
tuple: [o, count]
}, i) => Tp.tuple(f(o, i), count + 1)), Tp.get(0));
}
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