* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
1.9 KiB
1.9 KiB
id, title, challengeType, forumTopicId, dashedName
id | title | challengeType | forumTopicId | dashedName |
---|---|---|---|---|
587d7b8a367417b2b2512b4d | 使用解构赋值将对象作为函数的参数传递 | 1 | 301217 | use-destructuring-assignment-to-pass-an-object-as-a-functions-parameters |
--description--
在某些情况下,你可以在函数的参数里直接解构对象。
请看以下代码:
const profileUpdate = (profileData) => {
const { name, age, nationality, location } = profileData;
// do something with these variables
}
上面的操作解构了传给函数的对象。这样的操作也可以直接在参数里完成:
const profileUpdate = ({ name, age, nationality, location }) => {
/* do something with these fields */
}
这样的操作去除了多余的代码,使代码更加整洁。 这样做还有个额外的好处:函数不需要再去操作整个对象,而仅仅是操作复制到函数作用域内部的参数。
--instructions--
对half
的参数进行解构赋值,使得仅仅将max
与min
的值传进函数。
--hints--
stats
的类型应该是一个object
。
assert(typeof stats === 'object');
half(stats)
应该等于28.015
assert(half(stats) === 28.015);
应该使用解构赋值。
assert(code.replace(/\s/g, '').match(/half=\({\w+,\w+}\)/));
应该使用解构参数。
assert(!code.match(/stats\.max|stats\.min/));
--seed--
--seed-contents--
const stats = {
max: 56.78,
standard_deviation: 4.34,
median: 34.54,
mode: 23.87,
min: -0.75,
average: 35.85
};
// Only change code below this line
const half = (stats) => (stats.max + stats.min) / 2.0;
// Only change code above this line
--solutions--
const stats = {
max: 56.78,
standard_deviation: 4.34,
median: 34.54,
mode: 23.87,
min: -0.75,
average: 35.85
};
const half = ( {max, min} ) => (max + min) / 2.0;