Modificando Independente Classes

clone_class_sample.js

class C {
    constructor(nPesos){
        this.num = nPesos;
        this.pesos = [];
        for(let i=0;i < nPesos;i++){
            this.pesos[i] = Math.random() * 10;
        }
    }
}

class R {
    constructor(c) {
        this.c = c;
        this.tes = Math.random() * 10;
    }
}

var vetor = [];
var oldR = new R(new C(10))

// Se remover o Object.assign({}, obj) não funcionará
vetor.push(Object.assign({}, oldR)) 

function novo (vetor) {
    for (var i = 0; i < 2; i++) {
        vetor.push(Object.assign({}, new R(new C(i + 1))))
    }
}
novo(vetor)

vetor[0].tes = 5;
console.log(vetor)
console.log(oldR)