@simplesmiler/thru

Type-safe operator for chaining

• Allows function calls to follow the data flow instead of being nested
• Does not require pre-chain wrapping and post-chain unwrapping
• Does not require explicit-er types than usual
• Promotes code minification due to tree shaking and name mangling

Inspired by:

• Lodash.thru: https://lodash.com/docs/
• Bind operator proposal: https://github.com/tc39/proposal-bind-operator
• Pipeline operator proposal: https://github.com/tc39/proposal-pipeline-operator
• Do notation from Haskell: https://en.wikibooks.org/wiki/Haskell/do_notation
• Discussion over at https://esdiscuss.org/topic/array-prototype-tap

Install

npm install @simplesmiler/thru

Use

import { thru, tap } from '@simplesmiler/thru';
import { flatten } from 'lodash/fp';

const result = [1, 2, 3]
  .map((x) => [x, x * 2])
  [thru](flatten)
  [thru]((list) => list.slice().sort((a, b) => a - b))
  [tap]((sorted) => console.log('DEBUG:', sorted)) 
  .join(', ')
  [thru]((text) => `Computed numbers: ${text}`);

License

Copyright © 2020 Denis Karabaza [email protected].

This project is ISC licensed.