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Module

x/fun/mod.ts>optics.fold

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

Construct a Fold from get and modify functions.

Parameters

view: (s: S) => ReadonlyArray<A>
modify: (modifyFn: (a: A) => A) => (s: S) => S