Perform .join on value in array of objects

Question

If I have an array of strings, I can use the .join() method to get a single string, with each element separated by commas, like so:

[\"Joe\", \"         


        

Answer 1

try this

var x= [
  {name: "Joe", age: 22},
  {name: "Kevin", age: 24},
  {name: "Peter", age: 21}
]

function joinObj(a, attr) {
  var out = []; 
  for (var i=0; i "Joe, Kevin, Peter"
var y = joinObj(x,'age');
y > "22, 24, 21"