Oliver Eyton-Williams 0bd52f8bd1

and change all the challenges to new `md` format.

2020-11-27 10:02:05 -08:00

2.2 KiB

Raw Blame History

id, title, challengeType, videoUrl, forumTopicId

id	title	challengeType	videoUrl	forumTopicId
567af2437cbaa8c51670a16c	Testing Objects for Properties	1	https://scrimba.com/c/c6Wz4ySr	18324

--description--

Sometimes it is useful to check if the property of a given object exists or not. We can use the .hasOwnProperty(propname) method of objects to determine if that object has the given property name. .hasOwnProperty() returns true or false if the property is found or not.

Example

var myObj = {
  top: "hat",
  bottom: "pants"
};
myObj.hasOwnProperty("top");    // true
myObj.hasOwnProperty("middle"); // false

--instructions--

Modify the function checkObj to test if an object passed to the function (obj) contains a specific property (checkProp). If the property is found, return that property's value. If not, return "Not Found".

--hints--

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

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

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

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

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

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

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

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

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

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

checkObj({pet: "kitten", bed: "sleigh"}, "gift") should return "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";
  }
}

2.2 KiB Raw Blame History