Omits keys from JS object

object-omit.js

/**
 * Omits keys from object functional style.
 *
 * @param {object} obj – object to omit keys from.
 * @param {string} ...keys – array of string keys to extract from object.
 * @return {object} – new `obj` without `keys`.
 *
 * Example:
 * omit({ a: 1, b: 2, c: 3, x: 4, y: 5 }, 'a', 'x') returns { b: 2, c: 3, y: 5 }
 *
 */
const omit = (obj, ...keys) => {
  if (typeof obj !== 'object') { return obj; }

  return Object.keys(obj).reduce((newObj, next) =>
    (keys.indexOf(next) === -1 ? Object.assign({}, newObj, { [next]: obj[next] }) : newObj),
  {});
};

export default omit;