title: extjs 4 how to reverse the output from json?
body: <p>i'm working with couchdb as database.. i need show the data in pagination grid..<br>
  i can handle the <code>next page</code> proccess... but i am stack in how to handle <code>previous page</code></p>
  
  <p>after hard trying,... i can show previous json like this :</p>
  
  <p><code>http://localhost/myapp/_view/getAll?limit=2&amp;startkey=10&amp;skip=1&amp;descending=true</code>
  and the response :</p>
  
  <pre><code>{
      total_rows: 21,
      offset: 12,
      rows: [{
          id: "fd899e87f9f682a4df71d9e2a9010b26",
          key: 9,
          value: {
              _id: "fd899e87f9f682a4df71d9e2a9010b26",
              _rev: "1-ce4ed0e621ae53996f323a8927bcf470",
              $type: "siswa",
              Nama: "test9",
              Agama: "Islam",
              Hobi: ["Membaca","Menulis"]
          }
      } , {
          id: "fd899e87f9f682a4df71d9e2a9010622",
          key: 8,
          value: {
              _id: "fd899e87f9f682a4df71d9e2a9010622",
              _rev: "1-45c71654623d385bd95f6970c72dce50",
              $type: "siswa",
              Nama: "test8",
              Agama: "Islam",
              Hobi: ["Membaca","Menulis"]
          }
      }]
  }
  </code></pre>
  
  <p>the shown data is in reverse format.<br>
  as you can see, the response json start with key 9, and then 8..<br>
  so, the solution is reverse back in extjs / UI..</p>
  
  <p>how to reverse data from store in extjs 4 ?<br>
  in ext 3 i do that like this : <code>this.store.reader.reversed = true;</code> and then reload the store..</p>