jQuery : Get Distinct Comma Separated Value From ArrayList

let array = [

  { "name": "Ajay", "age": 17 },

  { "name": "Bobby", "age": 17 },

  { "name": "Sandy", "age": 35 }

];

array.map(item => item.age)

  .filter((value, index, self) => self.indexOf(value) === index)

 [17, 35]