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

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

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));
}