angularjs - How to add several same key object data in one key/value pair Javascript? -


this question has answer here:

i have data this:

[{     "key":"a",     "data":"1"   }, {     "key":"b",     "data":"2"   }, {     "key":"c",     "data":"12"  }, {     "key":"a",     "data":"6"   }, {     "key":"b",     "data":"4"   }]

output want is:

[     {         "key":"a",         "value":[{"data":"1"},{"data":"6"}]     },     {         "key":"b",         "value":[{"data":"2"},{"data":"4"}]     },     {         "key":"c",         "value":[{"data":"12"}]     } ]

i want output in javascript or typescript dynamically json data dynamic .

can please help.

you use hash table , group items key property.

if group not exist, create new group key , values array. ten puth new object result array. later push actual value values array.

var data = [{ key: "a", data: "1" }, { key: "b", data: "2" }, { key: "c", data: "12" }, { key: "a", data: "6" }, { key: "b", data: "4" }],      hash = object.create(null),      result = data. reduce(function (r, o) {          if (!hash[o.key]) {              hash[o.key] = { key: o.key, value: [] };              r.push(hash[o.key]);          }          hash[o.key].value.push({ data: o.data });          return r;      }, []);    console.log(result);
.as-console-wrapper { max-height: 100% !important; top: 0; }


Comments

Post a Comment

Popular posts from this blog

php - Vagrant up error - Uncaught Reflection Exception: Class DOMDocument does not exist -

i've set bento/ubuntu-16.04 vagrant box using php 5.6, , getting following error quite few times when try , run shell script: "uncaught reflection exception: class domdocument not exist". i've tried adding following top of script (not together), each no success: "sudo apt-get install php5.6-xml", "sudo apt-get install php5-xml", "sudo apt-get install php-dom" i've tried resetting server "sudo service apache2 restart". does have suggestions?
Read more

vue.js - Create hooks for automated testing -

Image
qa guys complained can't automate frontend testing. because our html looks same outside. lazy hack did this <template> <div :role="$options.name"> ... </div> </template> <script> export default { name: 'vmcomponentname' } </script> which takes name script , applies html. in browser get: <div role="vmcomponentname"> ... </div> line :role="$options.name" goes in every component. is there dry er solutions? please share. additional details i'll explain in details looking for. imagine have vmusercreate form creates user. test case can create user . to automatically test without role, have use following selector: .wrapper > .wrapper > .wrapper > .submit-button the test extremely brittle (will break lot). if use roles can use [role="vmusercreateform"] .submit-button selector. many folds less brittle. so basically, i'm ...
Read more

Add new key value to json node in java -

i have json file : { "id":1, "name":"abc", "addressdetails": { "city":"newyork" } } i wanted add 1 more key-value ("pincode" : "414141") node 'addressdetails'. i tried using : objectmapper mapper = new objectmapper(); jsonnode root = mapper.readtree(new file("d://test.json")); objectnode node = mapper.createobjectnode(); node.with("addressdetails").put("pincode", "414141"); but it's not getting added, there way can ? you can try you should modify file path objectmapper mapper = new objectmapper(); objectnode nodes = mapper.readvalue(new file("d:\\test.txt"), objectnode.class); nodes.with("addressdetails").put("pincode", "414141"); mapper.writer().writevalue(new file("d:\\test.txt"), nodes);
Read more