Clojure thread macro in JS
npm install clojure-threadClojure threading macro. Supports first, last, and as macro. No support for binding.
Might be useful for testing React / Redux reducer.
``javascript
const thread = require('clojure-thread')
// first
// returns 9
thread.first(
1,
x => x * 10,
[(x, y) => x - y, 1]
)
// last
// returns -9
thread.last(
1,
x => x * 10,
[(x, y) => x - y, 1]
)
// as
// returns -8
// second argument must be a function that
// takes a placeholder as input (which is just
// an empty object) and
// returns an array of functions or arrays
thread.as(
1,
placeholder => [
x => x * 10,
[(x, y) => x - y, placeholder, 1],
[(x, y) => x - y, 1, placeholder]
]
)
// React Redux reducer
const reducer = (state = 0, action) => {
switch(action.type) {
case "INC":
return state + 1
default:
return state
}
}
const state = thread.first(
reducer(undefined, {}),
[reducer, {type: "INC"}],
)
console.log(state == 1)
``
MIT