Creating an array of JSON objects from another array of JSON objects

Question

I have a JSON array like this:

[{Company:"", FirstName:"John", SecondName:"Smith", ID:"2345"},
{Company:"SomeComp", FirstName:"", SecondName:"Kane", ID:"4363"},
{Company:"Random", FirstName:"Tom", SecondName:"", ID:"6454"}]

I want to parse this and create a new array of objects which only have non-blank attributes without IDs, ie:

[{FirstName:"John", SecondName:"Smith"},
{Company:"SomeComp", SecondName:"Kane"},
{Company:"Random", FirstName:"Tom"}]

What is the best way of doing this in Javascript?

Answer 1

You can use map

The map() method creates a new array with the results of calling a provided function on every element in this array.

 var companies = [{Company:"", FirstName:"John", SecondName:"Smith", ID:"2345"}, {Company:"SomeComp", FirstName:"", SecondName:"Kane", ID:"4363"}, {Company:"Random", FirstName:"Tom", SecondName:"", ID:"6454"}]; // This returns a new array var newArray = companies.map(function(item) { var obj = {}; for(var prop in item) { if (item[prop] !== "" && prop !== "id" ) { obj[prop] = item[prop]; }; } return obj; }); console.log(newArray); 

Answer 2

This should do it

var input = JSON.parse("<YOUR JSON HERE>");
var output = [];
input.forEach(function(item) {
     delete item.ID;
     for (var prop in item) {
         if (item.hasOwnProperty(prop) && item[prop] === "") {
              item[prop] = undefined;
         }             
     }
output.push(item);
});