Sorting an array of objects with the sortBy method of Prototype

Posted: 2006-11-20 | Categories: JavaScript, Programming | Tags: Prototype

Here is an example of how easy it is to sort an array of objects using the Enumerable.sortBy method of the Prototype framework:

    
var obj1 = {
  lastName : "Lacava",
  firstName : "Alessandro"
};

var obj2 = {
  lastName : "Brown",
  firstName : "John"
};

var obj3 = {
  lastName : "Simpson",
  firstName : "Bart"
};

var arr = [obj1, obj2, obj3];

//order by last name
var sorted = arr.sortBy(function(obj) {
    return obj.lastName.toLowerCase();
  }
);

var str = "";
sorted.each( function(obj, index) {
    str += index + 1 + " - " + obj.lastName + " " + obj.firstName;
  }
);

//display the elements ordered by last name
document.write(str);