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church

2.1.0 • Public • Published

church

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Church encoding utility library for JavaScript

Why?

I built this library mostly as a learning exercise, but the code is also available as an npm module that can be consumed and used to build JavaScript applications using basically nothing but functions. I'm not sure why you would want to do that though!

What?

Church encoding is a way of encoding data using only functions. For instance, we can use functions to represent, booleans, numerals and lists. Higher-order functions are all you need for Turing completeness.

How?

Check out the docs.

Install

npm i church

Examples

import {
  decodeList,
  decodeNumeral,
  encodeList,
  encodeNumeral,
  five,
  If,
  lt,
  map,
  mult,
  one,
  range,
  three,
  two,
} from 'church'
 
const twoFourSix = map(mult(two))(range(one)(three))
// => church encoded list of [two four six]
 
const twoFourSixJs = decodeList(twoFourSix).map(decodeNumeral)
// => [2, 4, 6] (standard JS array of standard JS numbers)
 
encodeList(twoFourSixJs.map(encodeNumeral))
// => church encoded list of [two four six] again
 
map(x => If(lt(x)(five))(five)(x))(twoFourSix)
// => church encoded list of [five five six]

Resources

install

npm i church

Downloadsweekly downloads

22

version

2.1.0

license

MIT

homepage

github.com

repository

Gitgithub

last publish

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