freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/testing-objects-for-properties.md

id, title, challengeType, forumTopicId, dashedName

id	title	challengeType	forumTopicId	dashedName
567af2437cbaa8c51670a16c	Testing Objects for Properties	1	18324	testing-objects-for-properties

--description--

To check if a property on a given object exists or not, you can use the .hasOwnProperty() method. someObject.hasOwnProperty(someProperty) returns true or false depending on if the property is found on the object or not.

Example

function checkForProperty(object, property) {
  return object.hasOwnProperty(property);
}

checkForProperty({ top: 'hat', bottom: 'pants' }, 'top'); // true
checkForProperty({ top: 'hat', bottom: 'pants' }, 'middle'); // false

The first checkForProperty function call returns true, while the second returns false.

--instructions--

Modify the function checkObj to test if the object passed to the function parameter obj contains the specific property passed to the function parameter checkProp. If the property passed to checkProp is found on obj, return that property's value. If not, return Not Found.

--hints--

checkObj({gift: "pony", pet: "kitten", bed: "sleigh"}, "gift") should return the string pony.

assert(
  checkObj({ gift: 'pony', pet: 'kitten', bed: 'sleigh' }, 'gift') === 'pony'
);

checkObj({gift: "pony", pet: "kitten", bed: "sleigh"}, "pet") should return the string kitten.

assert(
  checkObj({ gift: 'pony', pet: 'kitten', bed: 'sleigh' }, 'pet') === 'kitten'
);

checkObj({gift: "pony", pet: "kitten", bed: "sleigh"}, "house") should return the string Not Found.

assert(
  checkObj({ gift: 'pony', pet: 'kitten', bed: 'sleigh' }, 'house') ===
    'Not Found'
);

checkObj({city: "Seattle"}, "city") should return the string Seattle.

assert(checkObj({ city: 'Seattle' }, 'city') === 'Seattle');

checkObj({city: "Seattle"}, "district") should return the string Not Found.

assert(checkObj({ city: 'Seattle' }, 'district') === 'Not Found');

checkObj({pet: "kitten", bed: "sleigh"}, "gift") should return the string Not Found.

assert(checkObj({ pet: 'kitten', bed: 'sleigh' }, 'gift') === 'Not Found');

--seed--

--seed-contents--

function checkObj(obj, checkProp) {
  // Only change code below this line
  return "Change Me!";
  // Only change code above this line
}

--solutions--

function checkObj(obj, checkProp) {
  if(obj.hasOwnProperty(checkProp)) {
    return obj[checkProp];
  } else {
    return "Not Found";
  }
}