3.2 KiB
3.2 KiB
id | title | challengeType | videoUrl | localeTitle |
---|---|---|---|---|
587d8253367417b2b2512c6d | Perform an Intersection on Two Sets of Data | 1 | Realizar uma interseção em dois conjuntos de dados |
Description
Set
chamada intersection
. Uma interseção de conjuntos representa todos os valores comuns a dois ou mais conjuntos. Este método deve ter outro Set
como argumento e retornar a intersection
dos dois conjuntos. Por exemplo, se setA = ['a','b','c']
e setB = ['a','b','d','e']
, a interseção de setA e setB é: setA.intersection(setB) = ['a', 'b']
. Instructions
Tests
tests:
- text: Sua classe <code>Set</code> deve ter um método de <code>intersection</code> .
testString: 'assert(function(){var test = new Set(); return (typeof test.intersection === "function")}, "Your <code>Set</code> class should have a <code>intersection</code> method.");'
- text: A coleção adequada foi retornada
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 intersectionSetAB = setA.intersection(setB); return (intersectionSetAB.size() === 1 && intersectionSetAB.values()[0] === "c")}, "The proper collection was returned");'
Challenge Seed
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 collection
this.size = function() {
return collection.length;
};
// this method will return the union of two sets
this.union = function(otherSet) {
var unionSet = new Set();
var firstSet = this.values();
var secondSet = otherSet.values();
firstSet.forEach(function(e){
unionSet.add(e);
});
secondSet.forEach(function(e){
unionSet.add(e);
});
return unionSet;
};
// change code below this line
// change code above this line
}
Solution
// solution required