Classes 03. Unity rats

class Rat {
    constructor(name){
        this.name = name;
        this.unitedRats = [];
    }
    unite(otherRat) {
        if (otherRat instanceof Rat){
            this.unitedRats.push(otherRat);
        }
    }
    getRats() {
        return this.unitedRats;
    }
    toString() {
        return `${this.name}\n${this.unitedRats.map(r=>`##${r}`).join('')}`
    }
}