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Module

x/fun/optics.ts>nilable

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

Wrap an Optic that focuses on a value that can be null or undefined such that it focuses only on non-null values

type

<U extends Tag, S, A>(first: Optic<U, S, A>) => Optic<Align<U, AffineTag>, S, NonNullable<A>>