* 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>
1.6 KiB
1.6 KiB
id, title, challengeType, videoUrl, dashedName
id | title | challengeType | videoUrl | dashedName |
---|---|---|---|---|
587d8254367417b2b2512c70 | 在ES6中创建和添加集 | 1 | create-and-add-to-sets-in-es6 |
--description--
既然您已经完成了ES5,那么您将在ES6中执行类似的操作。这将相当容易。 ES6包含一个内置的数据结构Set
现在包含了您手动编写的许多操作。我们来看看:创建一个新的空集: var set = new Set();
您可以使用值创建一个集合: var set = new Set(1);
您可以使用数组创建一个集合: var set = new Set([1, 2, 3]);
创建集合后,可以使用add
方法添加所需的值:
var set = new Set([1,2,3]);
set.add([4,5,6]);
提醒一下,集合是一种不能包含重复值的数据结构:
var set = new Set([1,2,3,1,2,3]);
// set仅包含[1,2,3]
--instructions--
在本练习中,返回一个具有以下值的集合: 1, 2, 3, 'Taco', 'Cat', 'Awesome'
--hints--
您的Set
应该只包含值1, 2, 3, Taco, Cat, Awesome
。
assert(
(function () {
var test = checkSet();
return (
test.size == 6 &&
test.has(1) &&
test.has(2) &&
test.has(3) &&
test.has('Taco') &&
test.has('Cat') &&
test.has('Awesome')
);
})()
);
--seed--
--seed-contents--
function checkSet() {
var set = new Set([1, 2, 3, 3, 2, 1, 2, 3, 1]);
// Only change code below this line
// Only change code above this line
console.log(Array.from(set));
return set;
}
checkSet();
--solutions--
function checkSet(){var set = new Set([1,2,3,'Taco','Cat','Awesome']);
return set;}