funkel v0.2.1

Simple and lightweight functional toolset inspired by Clojure using import.

Getting Started

Use import to bring in the necessary functions into your module. In the following example we're going to import the partial function and utilise it!

import {partial} from 'funkel';

const addNumbers = (a, b) => a + b;
const addTwo     = partial(addNumbers, 2);

expect(addTwo(3)).toEqual(5);

Releases

:package: v0.1.x

• identity(a)
• trace(a)
• curry(fn)
• partial(fn, ...a)
• compose(...fns)

• composeDeferred(...fns)

Examples

Below are a set of examples for using Funkel – although it's not an exhaustive list, and you should refer to the source and/or associated unit-tests if you need further information about what Funkel provides and how it functions.

trace

If you have a composed function but are having troubles, it's useful to console.log the current value at any given step, for these cases use trace in the compose function:

const pay = compose(printInvoice, f.trace, sendMoney, createOrder);

Promise-Safe Composing

For cases where you have functions that return promises, you can use the composeDeferred function.

import {composeDeferred} from 'funkel';

const addOne   = a => new Promise(resolve => resolve(a + 1));
const addTwo   = a => a + 2;
const addThree = a => new Promise(resolve => resolve(a + 3));

const composedFn = composeDeferred(addOne, addTwo, addEleven);

composedFn(0).then(result => {
    expect(result).toEqual(6);
});