sort array of objects by key

let = [{mame:2},{name:3}];
/**
*@param {string} key - key field
*/
function byField(field){
  return (a,b)=>a[field] > b[field] ? 1 : -1;
}
users.sort(byField('age'));
users.forEach(function(user) {
  alert( user.name );
});