# Perform a Difference on Two Sets of Data

## Solutions

Solution 1 (Click to Show/Hide)
``````class Set {
constructor() {
this.dictionary = {};
this.length = 0;
}

has(element) {
return this.dictionary[element] !== undefined;
}

values() {
return Object.keys(this.dictionary);
}

if (!this.has(element)) {
this.dictionary[element] = true;
this.length++;
return true;
}

return false;
}

remove(element) {
if (this.has(element)) {
delete this.dictionary[element];
this.length--;
return true;
}

return false;
}

size() {
return this.length;
}

union(set) {
const newSet = new Set();
this.values().forEach(value => {
})
set.values().forEach(value => {
})

return newSet;
}

intersection(set) {
const newSet = new Set();

let largeSet;
let smallSet;
if (this.dictionary.length > set.length) {
largeSet = this;
smallSet = set;
} else {
largeSet = set;
smallSet = this;
}

smallSet.values().forEach(value => {
if (largeSet.dictionary[value]) {
}
})

return newSet;
}

difference(set) {
const newSet = new Set();

this.values().forEach(value => {
if (!set.dictionary[value]) {