88 lines
2.8 KiB
Markdown
88 lines
2.8 KiB
Markdown
---
|
||
id: 587d8253367417b2b2512c6c
|
||
title: Perform a Union on Two Sets
|
||
challengeType: 1
|
||
videoUrl: ''
|
||
localeTitle: 在两个集上执行联合
|
||
---
|
||
|
||
## Description
|
||
<section id="description">在本练习中，我们将对两组数据执行联合。我们将在我们的<code>Set</code>数据结构上创建一个名为<code>union</code> 。此方法应将另一个<code>Set</code>作为参数，并返回两个集合的<code>union</code>集，不包括任何重复值。例如，如果<code>setA = ['a','b','c']</code>和<code>setB = ['a','b','d','e']</code> ，则setA和setB的并集为： <code>setA.union(setB) = ['a', 'b', 'c', 'd', 'e']</code> 。 </section>
|
||
|
||
## Instructions
|
||
<section id="instructions">
|
||
</section>
|
||
|
||
## Tests
|
||
<section id='tests'>
|
||
|
||
```yml
|
||
tests:
|
||
- text: 你的<code>Set</code>类应该有一个<code>union</code>方法。
|
||
testString: 'assert((function(){var test = new Set(); return (typeof test.union === "function")})(), "Your <code>Set</code> class should have a <code>union</code> method.");'
|
||
- text: 收回了适当的收藏
|
||
testString: 'assert((function(){var setA = new Set(); var setB = new Set(); setA.add("a"); setA.add("b"); setA.add("c"); setB.add("c"); setB.add("d"); var unionSetAB = setA.union(setB); var final = unionSetAB.values(); return (final.indexOf("a") !== -1 && final.indexOf("b") !== -1 && final.indexOf("c") !== -1 && final.indexOf("d") !== -1 && final.length === 4)})(), "The proper collection was returned");'
|
||
|
||
```
|
||
|
||
</section>
|
||
|
||
## Challenge Seed
|
||
<section id='challengeSeed'>
|
||
|
||
<div id='js-seed'>
|
||
|
||
```js
|
||
function Set() {
|
||
// the var collection will hold the set
|
||
var collection = [];
|
||
// this method will check for the presence of an element and return true or false
|
||
this.has = function(element) {
|
||
return (collection.indexOf(element) !== -1);
|
||
};
|
||
// this method will return all the values in the set
|
||
this.values = function() {
|
||
return collection;
|
||
};
|
||
// this method will add an element to the set
|
||
this.add = function(element) {
|
||
if(!this.has(element)){
|
||
collection.push(element);
|
||
return true;
|
||
}
|
||
return false;
|
||
};
|
||
// this method will remove an element from a set
|
||
this.remove = function(element) {
|
||
if(this.has(element)){
|
||
var index = collection.indexOf(element);
|
||
collection.splice(index,1);
|
||
return true;
|
||
}
|
||
return false;
|
||
};
|
||
// this method will return the size of the set
|
||
this.size = function() {
|
||
return collection.length;
|
||
};
|
||
// change code below this line
|
||
|
||
// change code above this line
|
||
}
|
||
|
||
```
|
||
|
||
</div>
|
||
|
||
|
||
|
||
</section>
|
||
|
||
## Solution
|
||
<section id='solution'>
|
||
|
||
```js
|
||
// solution required
|
||
```
|
||
</section>
|