javascript - 如何将数组附加到现有的 json javascript？

Question

我想创建一个 json 对象，例如：

{
   name: "Julia"
   birthdate: "xxxx"
   movies: [{title: "movie1", rating: 5}, {title: "movie2", rating 3}}]
}

我想做类似的事情：

var myobj = [];
myobj.push({name: "Julia", birthdate: "xxxx"});

myobj.movies = [];
myobj.movies.push({title: "movie1", rating: 5});
myobj.movies.push({title: "movie2", rating: 3});

但我无法创建那个“电影”部分。我该如何做到这一点？

Answer 1

您收到此错误是因为您将对象创建为数组。您必须创建为对象才能添加属性：

var myobj = {name: "Julia", birthdate: "xxxx"};

myobj.movies = []; 
myobj.movies.push({title: "movie1", rating: 5}); 
myobj.movies.push({title: "movie2", rating: 3}); 

Answer 2

您不能混合数据类型（推送仅适用于带有对象的数组和属性），请尝试以下操作：

var myobj = {};
myobj.persons = [];
myobj.persons.push({name: "Julia", birthdate: "xxxx"});

myobj.movies = [];
myobj.movies.push({title: "movie1", rating: 5});
myobj.movies.push({title: "movie2", rating: 3});

Answer 3

是的，这行得通

var myobj = []; myobj.push({name: "Julia", birthdate: "xxxx"});

myobj.push({movies: []});

myobj.movies = [];
myobj.movies.push({title: "movie1", rating: 5});
myobj.movies.push({title: "movie2", rating: 3});

console.log(myobj);</code>