How to write ES6 modules

my-module.js

export function each() {}

export function map() {}

export function reduce() {}

export function isEmpty() {}

export function extend() {}

export default function _() {}

extend(_, {each, map, reduce, isEmpty, extend, _, default: _});

Cases handled:

// returns an object with all methods
import _ from './my-module';

// after going through different ES6 compiler implementations, this could
// safely read [[exports]].default
import _ from './my-module';

// import individual exports
import {each, reduce} from './my-module';

// import all, destruct later
import _ from './my-module';
let { each, reduce } = _;

// import all when you also want the default export
import { _, each } from './my-module';
_(myValue).map(x => each(x, y => y * 2));