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Module

x/fun/const.ts>mapLeft

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 mapLeft
import { mapLeft } from "https://deno.land/x/fun@v2.0.0-alpha.6/const.ts";

Parameters

fbj: (b: B) => J

Returns

<A = never>(tab: Const<B, A>) => Const<J, A>