JavaScript Disjoint Set Union

! JavaScript Disjoint Set Union.js

class DisjointSetUnion
{
    constructor()
    {
        this.map = new Map();
    }
    
    find(x)
    {
        let other = this.map.has(x) ? this.map.get(x) : x;
        if (other != x)
        {
            other = this.find(other);
            this.map.set(x, other);
        }
        return other;
    }
    
    union(x, y)
    {
        this.map.set(this.find(x), this.find(y));
    }
}