freeCodeCamp/curriculum/challenges/chinese-traditional/10-coding-interview-prep/rosetta-code/deepcopy.md

id	title	challengeType	forumTopicId	dashedName
596a8888ab7c01048de257d5	Deepcopy	5	302247	deepcopy

--description--

Write a function that returns a deep copy of a given object. The copy must not be the same object that was given.

This task will not test for:

• Objects with properties that are functions
• Date objects or object with properties that are Date objects
• RegEx or object with properties that are RegEx objects
• Prototype copying

--hints--

deepcopy should be a function.

assert(typeof deepcopy === 'function');

deepcopy({test: "test"}) should return an object.

assert(typeof deepcopy(obj1) === 'object');

deepcopy should not return the same object that was provided.

assert(deepcopy(obj2) != obj2);

When passed an object containing an array, deepcopy should return a deep copy of the object.

assert.deepEqual(deepcopy(obj2), obj2);

When passed an object containing another object, deepcopy should return a deep copy of the object.

assert.deepEqual(deepcopy(obj3), obj3);

--seed--

--after-user-code--

const obj1 = { test: 'test' };
const obj2 = {
  t: 'test',
  a: ['an', 'array']
};
const obj3 = {
  t: 'try',
  o: obj2
};

--seed-contents--

function deepcopy(obj) {

  return true;
}

--solutions--

function deepcopy(obj) {
  return JSON.parse(JSON.stringify(obj));
}