varary=[1,2,3,4];functionfn(ary){ary[0]=0;ary=[0];ary[0]=100;returnary;}varres=fn(ary);//請問當(dāng)把函數(shù)給res的時(shí)候開辟新空間了嗎？還是指向函數(shù)定義時(shí)的那個(gè)空間？console.log(ary);console.log(res);