Files

Nicholas Carrigan (he/him) 3da4be21bb chore: seed chinese traditional (#42005 )

Seeds the chinese traditional files manually so we can deploy to
staging.

2021-05-05 22:43:49 +05:30

id, title, challengeType, videoUrl, forumTopicId, dashedName

id	title	challengeType	videoUrl	forumTopicId	dashedName
567af2437cbaa8c51670a16c	測試對象的屬性	1	https://scrimba.com/c/c6Wz4ySr	18324	testing-objects-for-properties

--description--

有時檢查一個對象屬性是否存在是非常有用的。我們可以用對象的 .hasOwnProperty(propname) 方法來檢查對象是否有指定的屬性。 .hasOwnProperty() 找到該屬性時返回 true，找不到該屬性時返回 false。

示例

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

第一個 hasOwnProperty 返回 true，第二個返回 false。

--instructions--

修改函數 checkObj 檢查 obj 是否有 checkProp 屬性。如果屬性存在，返回屬性對應的值。如果不存在，返回"Not Found"。

checkObj({gift: "pony", pet: "kitten", bed: "sleigh"}, "gift") 應該返回字符串 pony。

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

checkObj({gift: "pony", pet: "kitten", bed: "sleigh"}, "pet") 應該返回字符串 kitten。

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

checkObj({gift: "pony", pet: "kitten", bed: "sleigh"}, "house") 應該返回字符串 Not Found。

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

checkObj({city: "Seattle"}, "city") 應該返回字符串 Seattle。

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

checkObj({city: "Seattle"}, "district") 應該返回字符串 Not Found。

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

checkObj({pet: "kitten", bed: "sleigh"}, "gift") 應該返回字符串 Not Found。

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

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

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