What is this?

Poor man's yet another minimal Functional Programming toolkit for TypeScript.

Example

import { pipe } from "pipekit";
import { map } from "pipekit/dist/array";

pipe([1, 2, 3], map(x => x + 1), console.log)
// [2, 3, 4]

Why pipe is good?

const slackMessageString = ...

// without pipe 🤯
const result1 = stripHtmlTag(convertLinks(removeMentions(trimEmojis(slackMessageString))))

// with pipe 😇
const result2 = pipe(
    slackMessageString,
    trimEmojis,
    removeMentions,
    convertLinks,
    stripHtmlTags,
)

// One-off anonymous functions are also supported.
pipe(" Hoge ",
    x => x.trim(),
    x => x.length,
    console.log
)
// 4

Motivation

I used to use Array's built-in functions and Lodash when manipulating arrays, but I found it confusing with mixed methods to modify the original arrays, so I collected the immutable functions here.

I could use lodash/fp, but lodash/fp does not work with tree shaking and increases the bundle size, and fp-ts is overkill for me.

For me, a pipe function and a set of immutable functions is sufficient.