var input1 = [ { name: 'one' }, { name: 'two' }, { name: 'three' } ];
var input2 = [ { age: '1' }, { age: '2' }, { age: '3' } ];
result = [ { name: 'one',  age: '1' }, { name: 'two', age: '2' }, { name: 'three', name: 'three' } ];

var original = "one,two,three";

var myarray = [{ age: '1' }, { age: '2' }, { age: '3' }];
// this myarray could ALSO be an empty [] array.
myarray += original.split(',').map(s =>  ({name: s}));
console.log(myarray)