如何将对象添加到Javascript对象中？

Question

我有一个从SQL Server数据库获取的Entity Framework 5返回的以下javascript对象。

var a =
 {
  "questionId":14,
  "questionStatusId":1,
  "answers":null
 }

var b =
 {
  "questionId":15,
  "questionStatusId":1,
  "answers":[
   {"answerId":34,"correct":true,"response":false,"text":"5","image":null,"questionId":15},
   {"answerId":35,"correct":false,"response":false,"text":"50","image":null,"questionId":15}]
 }

我想添加一个空的答案对象，然后使用PUT发送回服务器。

如何将答案对象添加到变量a和变量b中？

Answer 1

var answer=[];
a.push( { "answer":answer } );
b.push( { "answer":answer } );

Answer 2

就像是

var newAnswer = {"answerId":0,"correct":false,"response":false,"text":"","image":null,"questionId":0};
b.answers.push(newAnswer);

可能正是您想要的。

Answer 3

您可以在运行时使用JavaScript在对象中添加属性。 例如

var a = { f : 10, g : 20 };
a.h = 30; 

同样，只需将答案属性添加到带有空白对象的a＆b中。

a.answer = []; // Empty non null array
b.answer = []; // "