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

2.1 KiB

Raw Blame History

id, title, challengeType, forumTopicId, dashedName

id	title	challengeType	forumTopicId	dashedName
587d7b89367417b2b2512b49	使用解構賦值從對象中分配變量	1	301215	use-destructuring-assignment-to-assign-variables-from-objects

--description--

可以給解構的值賦予一個新的變量名，通過在賦值的時候將新的變量名放在冒號後面來實現。

還是以上個例子的對象來舉例：

const user = { name: 'John Doe', age: 34 };

這是指定新的變量名的例子：

const { name: userName, age: userAge } = user;

你可以這麼理解這段代碼：獲取 user.name 的值，將它賦給一個新的變量 userName，等等。 userName 的值將是字符串 John Doe，userAge 的值將是數字 34。

--instructions--

使用解構賦值語句替換兩個賦值語句。將 HIGH_TEMPERATURES 的 today 和 tomorrow 的值賦值給 highToday 和 highTomorrow。

--hints--

應該移除 ES5 賦值語句。

assert(
  !code.match(/highToday = HIGH_TEMPERATURES\.today/g) &&
    !code.match(/highTomorrow = HIGH_TEMPERATURES\.tomorrow/g)
);

應該使用解構賦值語句創建 highToday 變量。

assert(
  code.match(
    /(var|const|let)\s*{\s*(today\s*:\s*highToday[^}]*|[^,]*,\s*today\s*:\s*highToday\s*)}\s*=\s*HIGH_TEMPERATURES(;|\s+|\/\/)/g
  )
);

應該使用解構賦值語句創建 highTomorrow 變量。

assert(
  code.match(
    /(var|const|let)\s*{\s*(tomorrow\s*:\s*highTomorrow[^}]*|[^,]*,\s*tomorrow\s*:\s*highTomorrow\s*)}\s*=\s*HIGH_TEMPERATURES(;|\s+|\/\/)/g
  )
);

highToday 應該等於 77，highTomorrow 應該等於 80。

assert(highToday === 77 && highTomorrow === 80);

--seed--

--seed-contents--

const HIGH_TEMPERATURES = {
  yesterday: 75,
  today: 77,
  tomorrow: 80
};

// Only change code below this line

const highToday = HIGH_TEMPERATURES.today;
const highTomorrow = HIGH_TEMPERATURES.tomorrow; 

// Only change code above this line

--solutions--

const HIGH_TEMPERATURES = {
  yesterday: 75,
  today: 77,
  tomorrow: 80
};

const { today: highToday, tomorrow: highTomorrow } = HIGH_TEMPERATURES;

2.1 KiB Raw Blame History Unescape Escape