freeCodeCamp/curriculum/challenges/en/08-coding-interview-prep/rosetta-code/deepcopy.en.md

title, id, challengeType

title	id	challengeType
Deepcopy	596a8888ab7c01048de257d5	5

Description

Task:

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

Instructions

Tests

- text: <code>deepcopy</code> should be a function.
  testString: 'assert(typeof deepcopy === ''function'', ''<code>deepcopy</code> should be a function.'');'
- text: '<code>deepcopy({test: "test"})</code> should return an object.'
  testString: 'assert(typeof deepcopy(obj1) === ''object'', ''<code>deepcopy({test: "test"})</code> should return an object.'');'
- text: Should not return the same object that was provided.
  testString: 'assert(deepcopy(obj2) != obj2, ''Should not return the same object that was provided.'');'
- text: 'When passed an object containing an array, should return a deep copy of the object.'
  testString: 'assert.deepEqual(deepcopy(obj2), obj2, ''When passed an object containing an array, should return a deep copy of the object.'');'
- text: 'When passed an object containing another object, should return a deep copy of the object.'
  testString: 'assert.deepEqual(deepcopy(obj3), obj3, ''When passed an object containing another object, should return a deep copy of the object.'');'

Challenge Seed

function deepcopy (obj) {
  // Good luck!
  return true;
}

After Test

console.info('after the test');

Solution

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