* 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>
1.7 KiB
1.7 KiB
id, title, challengeType, forumTopicId, dashedName
id | title | challengeType | forumTopicId | dashedName |
---|---|---|---|---|
587d8254367417b2b2512c70 | Create and Add to Sets in ES6 | 1 | 301636 | create-and-add-to-sets-in-es6 |
--description--
Now that you have worked through ES5, you are going to perform something similar in ES6. This will be considerably easier. ES6 contains a built-in data structure Set
so many of the operations you wrote by hand are now included for you. Let's take a look:
To create a new empty set:
var set = new Set();
You can create a set with a value:
var set = new Set(1);
You can create a set with an array:
var set = new Set([1, 2, 3]);
Once you have created a set, you can add the values you wish using the add
method:
var set = new Set([1, 2, 3]);
set.add([4, 5, 6]);
As a reminder, a set is a data structure that cannot contain duplicate values:
var set = new Set([1, 2, 3, 1, 2, 3]);
// set contains [1, 2, 3] only
--instructions--
For this exercise, return a set with the following values: 1, 2, 3, 'Taco', 'Cat', 'Awesome'
--hints--
Your Set
should only contain the values 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;}