Reflect all prototype-inherited instance methods. (ES6 classes)

methods.js

let writeMethods = (o, arr) => {
	// skip constructor
	for (let i = 1; i < arr.length; i++) {
		o[arr[i]] = 0;
	}
};

// Get object mirroring all instance methods of Class
export let methods = Class => {
	let last = Object.__proto__;
	let m = {};
	do {
		writeMethods(m, Object.getOwnPropertyNames(Class.prototype));
	} while ((Class = Class.__proto__) !== last);
	return m;
};