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關(guān)于indexOf()

JavaScript

慕萊塢森 2018-08-07 10:10:38

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兩者之間的差別。

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TA貢獻(xiàn)1799條經(jīng)驗(yàn) 獲得超8個(gè)贊

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

alert(people.indexOf(person)) ;  //-1//people里沒(méi)有person對(duì)象，當(dāng)然返回-1alert(morePeople.indexOf(person));  //0//morePeople里第0個(gè)元素就是person，所以返回所在位置0

歸根結(jié)底，你問(wèn)題是為什么{name: "n"} === {name: "n"}結(jié)果是false。那你要去看看Comparison operators