AngularJS将json格式转换为另一种json格式

Question

I'm trying to implement a questionnaire with angularjs,So I have the following response array ,I need to convert this object array to json format like the following output, So How can I convert object array to json format?

 var response=[{"questiongroup":1,"question":1,"response":"response1"},
                     {"questiongroup":1,"question":2,"response":"response2"},
                     {"questiongroup":1,"question":3,"response":"response3"},
                     {"questiongroup":1,"question":4,"response":"response4"},
                     {"questiongroup":1,"question":5,"response":"response5"},
                     {"questiongroup":2,"question":6,"response":"response6"},
                     {"questiongroup":2,"question":7,"response":"response7"},
                     {"questiongroup":2,"question":8,"response":"response8"},
                     {"questiongroup":2,"question":9,"response":"response9"},
                     {"questiongroup":2,"question":10,"response":"response10"}];

desired output

   {"questiongroups": [
                       {
                         "questiongroup": 1,
                         "question": [
                           {
                             "question": 1,
                             "response":"response1"
                           },
                           {
                             "question": 2,
                             "response":"response2"
                            },
                            {
                             "question": 3,
                             "response":"response3"
                             },
                            {
                             "question": 4,
                             "response":"response4"
                              },
                             {
                              "question": 5,
                              "response":"response5"
                             }]
                         },
                         {
                             "questiongroup": 2,
                             "question": [
                               {
                                 "question": 6,
                                 "response":"response6"
                               },
                               {
                                 "question": 7,
                                 "response":"response7"
                                },
                                {
                                 "question": 8,
                                 "response":"response8"
                                 },
                                {
                                 "question": 9,
                                 "response":"response9"
                                  },
                                 {
                                  "question": 10,
                                  "response":"response10"
                                 }]
                             }
                         ]
                    }

Answer 1

The fastest solution that came to me.

Reduces the response to a object with the questiongroup being the ids of the arrays. Then, to return as you want, mapped the keys to generate the array and created the object with the questiongroups value.

 var response=[{"questiongroup":1,"question":1,"response":"response1"}, {"questiongroup":1,"question":2,"response":"response2"}, {"questiongroup":1,"question":3,"response":"response3"}, {"questiongroup":1,"question":4,"response":"response4"}, {"questiongroup":1,"question":5,"response":"response5"}, {"questiongroup":2,"question":6,"response":"response6"}, {"questiongroup":2,"question":7,"response":"response7"}, {"questiongroup":2,"question":8,"response":"response8"}, {"questiongroup":2,"question":9,"response":"response9"}, {"questiongroup":2,"question":10,"response":"response10"}]; var questiongroups = response.reduce(function(groups, question){ var group = groups[question.questiongroup] || []; group.push({ question: question.question, response: question.response }); groups[question.questiongroup] = group; return groups; }, {}); questiongroups = Object.keys(questiongroups).map(function (key) {return {questiongroup: key, question: questiongroups[key]}}); var object = { questiongroups: questiongroups }; console.log(object); 

Answer 2

 var response=[{"questiongroup":1,"question":1,"response":"response1"}, {"questiongroup":1,"question":2,"response":"response2"}, {"questiongroup":1,"question":3,"response":"response3"}, {"questiongroup":1,"question":4,"response":"response4"}, {"questiongroup":1,"question":5,"response":"response5"}, {"questiongroup":2,"question":6,"response":"response6"}, {"questiongroup":2,"question":7,"response":"response7"}, {"questiongroup":2,"question":8,"response":"response8"}, {"questiongroup":2,"question":9,"response":"response9"}, {"questiongroup":2,"question":10,"response":"response10"}]; var result = { "questiongroups": [], } var group = { "questiongroup": 1, "question": [] } for (var i in response) { if (response[i].questiongroup != group.questiongroup) { result.questiongroups.push(group); group = { "questiongroup" : response[i].questiongroup, "question": [] }; } var entry = { "question" : { "question" : response[i].question, "response" : response[i].response } } group.question.push(entry); } result.questiongroups.push(group); console.log(result);