JS: Sort objects within an array

sortArrayOfObjects.js

// http://davidwalsh.name/array-sort
// If you provide a function expression to the sort method, you can sort 
// objects within the array using simple logic. Let's say you have an 
// array of objects representing persons and you want to sort them by age. 
// Oh yes, it can be done, and quite easily:

[
  { name: "Robin Van Persie", age: 28 },
  { name: "Theo Walcott", age: 22 },
  { name: "Bacary Sagna", age: 26  }
].sort(function(obj1, obj2) {
  // Ascending: first age less than the previous
  return obj1.age - obj2.age;
});

// Returns:  
// [
//    { name: "Theo Walcott", age: 22 },
//    { name: "Bacary Sagna", age: 26  },
//    { name: "Robin Van Persie", age: 28 }
// ]