CODEWITHSUNDEEP
javascript
Scott
Scott

Reputation: 85

Sorting [Object Object] array in Javascript

I have an array that is structured like this.

Object
    (
       [11065] => Object
              (
                  [firtname] => Linda
                  [lastname] => Bell
                  [fullname] => Bell, Linda

               )
       [11110] => Object
                (
                  [firstname] => Andrew
                  [lastname] => Smith
                  [fullname] => Andrew, Smith
                )
       [11279] => Object
               (
                  [firstname] => Sabrina
                  [lastname] => Wu
                  [fullname] => Sabrina Wu
               )

    )

As you can see the array is current being sorted by the persons id given by [11065],[11110],[11279]

Is there a way to sort this array by person's lastname in JavaScript or jQuery?

Upvotes: 1

Views: 551

Answers (6)

cwb
cwb

Reputation: 925

Use a compareFunction with Array.sort(compareFunction). To do that, you need the containing object to be an Array, so you probably want to do something like:

var a = [{id: 11065,
          firstname: "Linda",
          lastname: "Bell"},
         {id: 11279,
          firstname: "Sabrina",
          lastname: "Wu"},
         {id: 11110,
          firstname: "Andrew",
          lastname: "Smith"}
];

a.sort(function (a, b) { if (a.lastname > b.lastname) {
                 return 1;
             } else if (a.lastname < b.lastname) {
                 return -1;
             } else {
                 return 0;
             }});

console.log(a);

Upvotes: 2

John Strickler
John Strickler

Reputation: 25421

Arrays are Objects. Try this:

Array.prototype.sort.call(yourObject, function(x, y) {
    return x.lastName > y.lastName;
});

I'd take lonesomeday's advice though and use an actual Array.

Do your keys mean something? I'd make them a property of your objects inside your array.

Upvotes: 0

lonesomeday
lonesomeday

Reputation: 238045

You are using an object, not an array. Arrays are a special kind of object with sequentially named properties and certain special properties and methods to help access them.

Javascript object properties are not sorted in any particular order. According to the specification, there is no defined order; most browsers will use the order in which properties are defined. You should neither rely on any particular order nor expect to change it.

If you want an ordered collection, you'll need an array.

Upvotes: 1

Nathan Romano
Nathan Romano

Reputation: 7096

var data = [
    { name:"nate"},
    {name:"john"}, 
    {name:"paul"} 
]; 
data.sort(function(a, b) {
    return a.name > b.name; 
});

Upvotes: 0

aepheus
aepheus

Reputation: 8197

If I'm not mistaken, you can pass a compare function to the array.sort method. (which if I'm not mistaken does not exist in all browsers). I'm sure they have something around somewhere. jQuery has a sort that takes a function for sure.

Anyway, you would make a function to compare your objects based on last name rather than that id.

Array.sort( function ( a, b ) {
  if (a.lastname < b.lastname) return -1;
  if (a.lastname > b.lastname) return 1;
  return 0;
});

Expanded upon Mimisbrunnr's example.

Upvotes: 0

zellio
zellio

Reputation: 32524

Array.sort takes a functional argument with which it compares values.

Array.sort( function ( a, b ) {
  if (a < b) return -1;
  if (a > b) return 1;
  return 0;
});

Upvotes: 0

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