如何讓我的JSON對象的長度

Question

下面是我的JSON對象

{"Decision":[{"recid":"1183","reason":"Approved as Requested","decision":"Approved","approvalamt":"","comment":""},{"recid":"662","reason":"3","decision":"Rejected","approvalamt":"","comment":""},{"recid":"752","reason":"Approved People Resources; But No Funding Approved","decision":"Approved","approvalamt":"","comment":""}]} 

如何獲得this.In的長度這個例子中，它應該返回我3 我的對象名稱是DecisionObj具有高於列出的元素。

Answer 1

var string = '{"Decision":[{"recid":"1183","reason":"Approved as Requested","decision":"Approved","approvalamt":"","comment":""},{"recid":"662","reason":"3","decision":"Rejected","approvalamt":"","comment":""},{"recid":"752","reason":"Approved People Resources; But No Funding Approved","decision":"Approved","approvalamt":"","comment":""}]}'; 
 

 
var object = JSON.parse(string); 
 

 
alert(object.Decision.length);

Answer 2

數組有length財產。你可以使用它。

var length = DecisionObj.length;