关于indexOf()

Question

 var person ={name:"n"}    var people=[{name:"n"}]; var morePeople=[person];     alert(people.indexOf(person)) ;  //-1 alert(morePeople.indexOf(person));  //0 //不明白people和morePeople两者之间的差别。

Answer 1

var person ={name:"n"}   
var people=[{name:"n"}];var morePeople=[person];

alert(people.indexOf(person)) ;  //-1//people里没有person对象，当然返回-1alert(morePeople.indexOf(person));  //0//morePeople里第0个元素就是person，所以返回所在位置0

归根结底，你问题是为什么{name: "n"} === {name: "n"}结果是false。那你要去看看Comparison operators