Monadic functions for pull-streams
These are the methods that make something "monadic." These functions and their interactions with each other satisfy the laws laid out in fantasy-land.
Usually these methods exist on the protytpe and are used like so:
const lift2 = (f, a, b) => b.ap(a.map(f))
Because these are simply through's, though, they must be used as such:
const lift2 = (f, a, b) => pull(b, ap(pull(a, map(f))))
const pull = require('pull-stream')
const { map, of, ap, chain } = require('pull-monad')
const plus1 = x => x + 1 // takes a number and returns a number
const times7 = x => x * 7 // takes a number and returns a number
const triplicate = x => pull.values([x, x, x]) // takes a number and returns a stream
pull(
lift2(a => b => a + b, of(1), of(2)),
map(times7),
chain(triplicate),
ap(of(plus1)),
pull.collect((err, arr) => console.log(arr)))
// => [22, 22, 22]
![greenkeeper[bot] avatar](https://avatars.githubusercontent.com/in/505?v=4 "greenkeeper[bot]")
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent