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Module

x/fun/pair.ts>mergeSecond

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

Apply a function in the first position of a pair to a value in the second position of a pair.

Examples

Example 1

import * as P from "./pair.ts";
import { flow } from "./fn.ts";

const double = flow(
  P.dup<number>,
  P.mapSecond(n => (m: number) => n + m),
  P.mergeSecond,
);

const result1 = double(1); // 2
const result2 = double(2); // 4

Parameters

ua: Pair<A, (a: A) => I>