2021-09-25

最新推荐文章于 2025-12-18 10:02:55 发布

原创最新推荐文章于 2025-12-18 10:02:55 发布 · 113 阅读

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#javascript #python

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js对象

'use strict'
'use strict'
var person={name:"kuangsheng",age:3,email:"24736743@qq.com",score:0}
undefined
person.name
'kuangsheng'
person.age
3
person.email
'24736743@qq.com'
person.score
0
person.gaga
undefined
person.haha
undefined
delete person.name
true
person
{age: 3, email: '24736743@qq.com', score: 0}
delete person.age
true
person
{email: '24736743@qq.com', score: 0}
person.haha=haha
VM3740:1 Uncaught ReferenceError: haha is not defined
    at <anonymous>:1:13
(匿名) @ VM3740:1
person.haha='haha'
'haha'
age in person
VM3855:1 Uncaught ReferenceError: age is not defined
    at <anonymous>:1:1
(匿名) @ VM3855:1
'age' in person
false
'haha' in person
true
'haha' inperson
VM3976:1 Uncaught SyntaxError: Unexpected identifier
'haha' in person
true
'toString' in person
true
'toString' in person
true
person.hasOwnProperty('age')
false
person.hasOwnProperty('haha')
true
person.hasOwnProperty('age')
false