@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.
22 lines (20 loc) • 773 B
JavaScript
// ets_tracing: off
import * as CK from "../../../Collections/Immutable/Chunk/index.mjs";
import * as HM from "../../../Collections/Immutable/HashMap/index.mjs";
import * as FoldLeftChunks from "./foldLeftChunks.mjs";
/**
* A sink that collects all of its inputs into a map. The keys are extracted from inputs
* using the keying function `key`; if multiple inputs use the same key, they are merged
* using the `f` function.
*/
export function collectAllToMap(key, f) {
return FoldLeftChunks.foldLeftChunks(HM.make(), (acc, as) => CK.reduce_(as, acc, (acc, a) => {
const k = key(a);
if (HM.has_(acc, k)) {
return HM.update_(acc, k, v => f(v, a));
} else {
return HM.set_(acc, k, a);
}
}));
}
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