88 lines
3.2 KiB
Markdown
88 lines
3.2 KiB
Markdown
|
---
|
|||
|
|
id: 587d8253367417b2b2512c6c
|
|||
|
|
title: Perform a Union on Two Sets
|
|||
|
|
challengeType: 1
|
|||
|
|
videoUrl: ''
|
|||
|
|
localeTitle: Выполните Союз на двух наборах
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## Description
|
|||
|
|
<section id="description"> В этом упражнении мы собираемся выполнить объединение на двух наборах данных. Мы создадим метод в нашей структуре данных <code>Set</code> называемый <code>union</code> . Этот метод должен принимать другой <code>Set</code> в качестве аргумента и возвращать <code>union</code> двух наборов, исключая любые повторяющиеся значения. Например, если <code>setA = ['a','b','c']</code> и <code>setB = ['a','b','d','e']</code> , то объединение множества A и setB: <code>setA.union(setB) = ['a', 'b', 'c', 'd', 'e']</code> . </section>
|
|||
|
|
|
|||
|
|
## Instructions
|
|||
|
|
<section id="instructions">
|
|||
|
|
</section>
|
|||
|
|
|
|||
|
|
## Tests
|
|||
|
|
<section id='tests'>
|
|||
|
|
|
|||
|
|
```yml
|
|||
|
|
tests:
|
|||
|
|
- text: Класс <code>Set</code> должен иметь метод <code>union</code> .
|
|||
|
|
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: Собственная коллекция была возвращена
|
|||
|
|
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>
|