Idea for pure objects in javascript

pure-obj.js

// PureObj is an object wrapper for fantasy land
// which is pure, every change is cloned into
// a new object
// - Semigroup (concat)
// - monoid (empty)
// - functor (map)

// When a pure obj is created, the original values are cloned
// deeply into a new object
var myObj = PureObj({ a: 'hello' });

// Pointfree console log
var log = console.log.bind(console.log)

// Map unwraps the pure, it does this by creating a new object
// which is the original object with the list of applied changes
myObj.map(log);
// >> { a: 'hello' }

// Empty is an empty object wrapped in a PureObj
PureObj.empty().map(log);
// >> { }

// Internally, every time you modify the PureObj it avoids cloning
// the object in favor of keeping a changeset
PureObj({ a: 20, b: 'hello' }).concat({ b: 'goodbye' }).map(log);
// >> { a: 20, b: 'goodbye' }