Clojure core.set thingies in JS

relational-thingies.js

const selectKeys = (m, keys) => {
	return keys.reduce((acc, k) => {
		acc[k] = m[k];
		return acc;
	}, {});
}

const invertMap = (m) =>
			Object.keys(m).reduce((acc, k) => {
				acc[m[k]] = k;
				return acc;
			}, {})

const renameKeys = (m, keyMap) =>
			Object.keys(m).reduce((acc, k) => {
				if (keyMap.hasOwnProperty(k)) {
					acc[keyMap[k]] = m[k];
				} else {
					acc[k] = m[k];
				}
				return acc;
			}, {});