compose

import { compose } from "https://github.gh-proxy.cn/raw.githubusercontent.com/baetheus/fun/main/fn.ts";

Compose two functions by taking the output of one and passing it to another. This is equivalent to the map function.

@example

import { compose, pipe } from "./fn.ts";

const length = (s: string) => s.length;
const dup = (n: number) => n + n;

const composed = pipe(
  length,
  compose(dup),
);

const result1 = composed("Hello"); // 10
const result2 = composed(""); // 0

function compose<A, I>(second: Fn<A, I>): <D>(first: Fn<D, A>) => Fn<D, I>;

compose<A, I>(second: Fn<A, I>): <D>(first: Fn<D, A>) => Fn<D, I>

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§Type Parameters

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§Parameters

second: Fn<A, I>

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§Return Type

<D>(first: Fn<D, A>) => Fn<D, I>

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