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93 lines
1.7 KiB
Markdown
93 lines
1.7 KiB
Markdown
---
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id: 587d8254367417b2b2512c70
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title: Create and Add to Sets in ES6
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challengeType: 1
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forumTopicId: 301636
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dashedName: create-and-add-to-sets-in-es6
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---
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# --description--
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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:
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To create a new empty set:
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```js
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var set = new Set();
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```
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You can create a set with a value:
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```js
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var set = new Set(1);
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```
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You can create a set with an array:
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```js
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var set = new Set([1, 2, 3]);
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```
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Once you have created a set, you can add the values you wish using the `add` method:
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```js
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var set = new Set([1, 2, 3]);
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set.add([4, 5, 6]);
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```
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As a reminder, a set is a data structure that cannot contain duplicate values:
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```js
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var set = new Set([1, 2, 3, 1, 2, 3]);
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// set contains [1, 2, 3] only
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```
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# --instructions--
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For this exercise, return a set with the following values: `1, 2, 3, 'Taco', 'Cat', 'Awesome'`
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# --hints--
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Your `Set` should only contain the values `1, 2, 3, Taco, Cat, Awesome`.
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```js
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assert(
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(function () {
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var test = checkSet();
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return (
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test.size == 6 &&
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test.has(1) &&
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test.has(2) &&
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test.has(3) &&
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test.has('Taco') &&
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test.has('Cat') &&
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test.has('Awesome')
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);
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})()
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);
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```
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# --seed--
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## --seed-contents--
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```js
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function checkSet() {
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var set = new Set([1, 2, 3, 3, 2, 1, 2, 3, 1]);
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// Only change code below this line
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// Only change code above this line
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console.log(Array.from(set));
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return set;
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}
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checkSet();
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```
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# --solutions--
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```js
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function checkSet(){var set = new Set([1,2,3,'Taco','Cat','Awesome']);
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return set;}
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```
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