[JS] Functional JavaScript with filter, map and sort

functional.js

var collection = [
  {name:"Lidy", gender:"female"},
  {name:"", gender:"unknown"},
  {name:"Guto", gender:"male"},
  {name:"Daniel", gender:"male"},
  {name:"", gender:"unknown"},
  {name:"Edy", gender:"male"},
  {name:"Udit", gender:"male"},
  {name:"Scott", gender:"male"},
  {name:"", gender:"unknown"},
  {name:"", gender:"unknown"},
  {name:"Colin", gender:"male"},
  {name:"Luciano", gender:"male"}
];

var sortedNames = collection
                   .filter(hasName)
                   .map(onlyName)
                   .sort();

console.log(sortedNames); 


//-------------------------------

function hasName(item) {
  return (item.name) ? true : false;
}

function onlyName(item) {
  return item.name;
}