freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/delete-properties-from-a-javascript-object.english.md

id, title, challengeType, videoUrl, forumTopicId

id	title	challengeType	videoUrl	forumTopicId
56bbb991ad1ed5201cd392d3	Delete Properties from a JavaScript Object	1	https://scrimba.com/c/cDqKdTv	17560

Description

We can also delete properties from objects like this: delete ourDog.bark;

Example:

var ourDog = {
  "name": "Camper",
  "legs": 4,
  "tails": 1,
  "friends": ["everything!"],
  "bark": "bow-wow"
};

delete ourDog.bark;

After the last line shown above, ourDog looks like:

{
  "name": "Camper",
  "legs": 4,
  "tails": 1,
  "friends": ["everything!"]
}
*/

Instructions

Delete the "tails" property from myDog. You may use either dot or bracket notation.

Tests

tests:
  - text: You should delete the property <code>"tails"</code> from <code>myDog</code>.
    testString: assert(typeof myDog === "object" && myDog.tails === undefined);
  - text: You should not modify the <code>myDog</code> setup.
    testString: 'assert(code.match(/"tails": 1/g).length > 1);'

Challenge Seed

// Setup
var myDog = {
  "name": "Happy Coder",
  "legs": 4,
  "tails": 1,
  "friends": ["freeCodeCamp Campers"],
  "bark": "woof"
};

// Only change code below this line

After Test

(function(z){return z;})(myDog);

Solution

var ourDog = {
  "name": "Camper",
  "legs": 4,
  "tails": 1,
  "friends": ["everything!"],
  "bark": "bow-wow"
};
var myDog = {
  "name": "Happy Coder",
  "legs": 4,
  "tails": 1,
  "friends": ["freeCodeCamp Campers"],
  "bark": "woof"
};
delete myDog.tails;