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Module

x/fun/map.ts>update

A collection of algebraic data types, lenses, and schemables based on a light weight higher kinded type implementation. Written for deno.
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function update
import { update } from "https://deno.land/x/fun@v2.0.0-alpha.6/map.ts";

Returns

<A>(value: A) => (key: B) => (map: ReadonlyMap<B, A>) => ReadonlyMap<B, A>