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Deepcopy

curriculum/challenges/english/blocks/rosetta-code-challenges/596a8888ab7c01048de257d5.md

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--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:

<ul> <li>Objects with properties that are functions</li> <li>Date objects or object with properties that are Date objects</li> <li>RegEx or object with properties that are RegEx objects</li> <li>Prototype copying</li> </ul>

--before-each--

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

--hints--

deepcopy should be a function.

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

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

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

deepcopy should not return the same object that was provided.

js
assert(deepcopy(obj2) != obj2);

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

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

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

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

--seed--

--seed-contents--

js
function deepcopy(obj) {

  return true;
}

--solutions--

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