42 lines
850 B
JavaScript
42 lines
850 B
JavaScript
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class Set {
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constructor() {
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// Dictionary will hold the items of our set
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this.dictionary = {};
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this.length = 0;
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}
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// This method will check for the presence of an element and return true or false
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has(element) {
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return this.dictionary[element] !== undefined;
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}
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// This method will return all the values in the set
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values() {
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return Object.keys(this.dictionary);
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}
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// Only change code below this line
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add(item) {
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if (this.dictionary[item] === undefined) {
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this.dictionary[item] = true;
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this.length++;
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return true;
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}
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return false;
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}
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remove(item) {
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if (this.dictionary[item] === undefined) {
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return false;
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}
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delete this.dictionary[item];
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this.length--;
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return true;
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}
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size() {
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return this.length;
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}
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// Only change code above this line
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}
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