代码的小小疑惑

Question

varType={};//type=["String","Array","Number"][i++]这不成了一个复合数组了吗？？不太理解for(vari=0,type;type=["String","Array","Number"][i++];){(function(type){Type["is"+type]=function(obj){returnObject.prototype.toString.call(obj)==='[object]'+type+']';}})(type);}alert(Type.isArray([]));alert(Type.isString("str"));

Answer 1

type="String","Array","Number";
即
vararr=["String","Array","Number"];varj=i++;vartype=arr[j];
                            

Answer 2

type=["String","Array","Number"][i++]
这句话可以这样来理解
vartypeList=["String","Array","Number"];
type=typeList[i];
i++;