BackboneJS - Ordinamento per raccolta

Descrizione

Il comando collection sort ordina gli elementi nella raccolta e utilizza l'estensione comparator proprietà per ordinare gli elementi.

Sintassi

collection.sort(options)

Parametri

options - Contiene parametri opzionali come true o false per disabilitare o abilitare l'ordinamento.

Esempio

<!DOCTYPE html>
<html>
   <head>
      <title>Collection Example</title>
      <script src = "https://code.jquery.com/jquery-2.1.3.min.js"
         type = "text/javascript"></script>
      
      <script src = "https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js"
         type = "text/javascript"></script>
      
      <script src = "https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js"
         type = "text/javascript"></script>
   </head>
   
   <body>
      <script type = "text/javascript">
         var Player = Backbone.Model.extend();  //'Player' is a model name

         //The variable 'Players' contains the items which are to be displayed in the ascending order
         var Players = [
            {player: 'sachin',id: '44'},
            {player: 'ganguly',id: '22'},
            {player: 'dhoni',id:'33'}
         ];

         //'myteam' is a collection instance and model 'Player' is specified using model property
         var myteam = new Backbone.Collection (Players, {
            model:Player,

            //The comparator method is used to maintain the collection in sorted order
            comparator: 'player'
         });

         //display the sorted records, records are sorted based on player as we have set comparator to 'player'
         document.write("The sorted items are: ",JSON.stringify(myteam.toJSON()));
      </script>
      
   </body>
</html>

Produzione

Eseguiamo i seguenti passaggi per vedere come funziona il codice sopra:

Salva il codice sopra nel file sort.htm file
Apri questo file HTML in un browser.

↰ Previous page