ositowang

const objectContructor = (...args) => {
  //get the constructor function
  let constructor = [].shift.call(args);
  /**
   *  create a new object and link the prototype to the function prototype
   *  equals to var obj = new Object(), obj.__proto__ = Constructor.prototype
   */
  
  let obj = Object.create(constructor.prototype);
  

ositowang

/**
 * Ultimate version solving circular dependency with weakMap
 * Problems:
 * 1. Symbols not covered
 *
 * @param {Object} sourceObj
 * @param {WeakMap} [hash=new WeakMap()]
 * @returns
 */
var deepCloneUltimate = (sourceObj, hash = new WeakMap()) => {

ositowang

/**
 * You should be good with this solution
 * More comprehensive deepclone with JS. Cover null and Array.
 * Problems:
 * 1. did not solve the circular dependency
 * @param {Object} sourceObj
 * @returns
 */
var deepCloneBetter = (sourceObj) => {
  // if we are not dealing with complex data structure

ositowang

/**
 *  Maybe good enough for interview Simpliest Version of deepClone.
 * Problems:
 * 1. the type check of object is not strict
 * 2. did not cover array
 * 3. did not cover null
 * @param {Object} sourceObj
 * @returns
 */
var deepCloneSimple = (sourceObj) => {

ositowang

var newObj = JSON.parse( JSON.stringify( someObj ) );