2.3 KiB
2.3 KiB
id | title | challengeType | videoUrl | localeTitle |
---|---|---|---|---|
587d8253367417b2b2512c6b | Remove from a Set | 1 | 从集合中删除 |
Description
this.remove
。此函数应接受一个值并检查它是否存在于集合中。如果是,请从集合中删除该值,然后返回true。否则,返回false。 Instructions
Tests
tests:
- text: 您的<code>Set</code>类应该有一个<code>remove</code>方法。
testString: 'assert((function(){var test = new Set(); return (typeof test.remove === "function")}()), "Your <code>Set</code> class should have a <code>remove</code> method.");'
- text: 您的<code>remove</code>方法应该只删除集合中存在的项目。
testString: 'assert.deepEqual((function(){var test = new Set(); test.add("a");test.add("b");test.remove("c"); return test.values(); })(), ["a", "b"], "Your <code>remove</code> method should only remove items that are present in the set.");'
- text: 您的<code>remove</code>方法应从集合中删除给定的项目。
testString: 'assert((function(){var test = new Set(); test.add("a");test.add("b");test.remove("a"); var vals = test.values(); return (vals[0] === "b" && vals.length === 1)}()), "Your <code>remove</code> method should remove the given item from the set.");'
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;
};
// change code below this line
// change code above this line
}
Solution
// solution required