Composition

composition.js

const R = require('ramda');

const giveProp = (propName, prop, obj) => Object.assign({}, obj, {[propName]: prop});

const givePropCurry = R.curry(giveProp);

const giveName = givePropCurry('name');
const giveJob = givePropCurry('job');
const giveHero = givePropCurry('hero');

const makeSolo = R.compose(giveName('Han'), giveJob('smuggler')) //points-free style
const solo = makeSolo({movie: 'Star Wars'}); 
//=>{ movie: 'Star Wars', job: 'smuggler', name: 'Han' }

const makeRen = R.compose(giveName('Kylo'), giveHero('Darth Vader'));
const ren = makeRen({movie: 'Star Wars'}); 
//=>{ movie: 'Star Wars', hero: 'Darth Vader', name: 'Kylo' }