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@@ -2,38 +2,27 @@
 @name Tutorial: 4 - Two-way Data Binding
 @description
 
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 <ul doc:tutorial-nav="4"></ul>
 
 
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 In this step, you will add a feature to let your users control the order of the items in the phone
 list. The dynamic ordering is implemented by creating a new model property, wiring it together with
 the repeater, and letting the data binding magic do the rest of the work.
 
 
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 <doc:tutorial-instructions step="4"></doc:tutorial-instructions>
 
 
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 You should see that in addition to the search box, the app displays a drop down menu that allows
 users to control the order in which the phones are listed.
 
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 The most important changes are listed below. You can see the full diff on {@link
 https://github.com/angular/angular-phonecat/compare/step-3...step-4
 GitHub}:
 
 
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 ## Template
 
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 __`app/index.html`:__
 <pre>
 ...
@@ -50,7 +39,6 @@ __`app/index.html`:__
     </li>
   </ul>
 
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   <ul class="phones">
     <li ng:repeat="phone in phones.$filter(query).$orderBy(orderProp)">
       {{phone.name}}
@@ -60,26 +48,20 @@ __`app/index.html`:__
 ...
 </pre>
 
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 In the `index.html` template we made the following changes:
 
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 * First, we added a `<select>` html element named `orderProp`, so that our users can pick from the
 two provided sorting options.
 
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       <img src="img/tutorial/tutorial_04-06_final.png">
 
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 * We then chained the `$filter` method with {@link api/angular.Array.orderBy `$orderBy`} method to
 further process the input into the repeater. `$orderBy` is a utility method similar to {@link
 api/angular.Array.filter `$filter`}, but instead of filtering an array, it reorders it.
 
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 Angular creates a two way data-binding between the select element and the `orderProp` model.
 `orderProp` is then used as the input for the `$orderBy` method.
 
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 As we discussed in the section about data-binding and the repeater in step 3, whenever the model
 changes (for example because a user changes the order with the select drop down menu), angular's
 data-binding will cause the view to automatically update. No bloated DOM manipulation code is
@@ -87,17 +69,12 @@ necessary!
 
 
 
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-
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 ## Controller
 
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 __`app/js/controller.js`:__
 <pre>
 /* App Controllers */
 
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 function PhoneListCtrl() {
   this.phones = [{"name": "Nexus S",
                   "snippet": "Fast just got faster with Nexus S.",
@@ -109,21 +86,17 @@ function PhoneListCtrl() {
                   "snippet": "The Next, Next Generation tablet.",
                   "age": 2}];
 
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   this.orderProp = 'age';
 }
 </pre>
 
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 * We modified the `phones` model - the array of phones - and added an `age` property to each phone
 record. This property is used to order phones by age.
 
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 * We added a line to the controller that sets the default value of `orderProp` to `age`. If we had
 not set the default value here, angular would have used the value of the first `<option>` element
 (`'name'`) when it initialized the data model.
 
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   This is a good time to talk about two-way data-binding. Notice that when the app is loaded in the
 browser, "Newest" is selected in the drop down menu. This is because we set `orderProp` to `'age'`
 in the controller. So the binding works in the direction from our model to the UI. Now if you
@@ -133,39 +106,28 @@ to the model.
 
 
 
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 ## Test
 
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 The changes we made should be verified with both a unit test and an end-to-end test. Let's look at
 the unit test first.
 
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 __`test/unit/controllerSpec.js`:__
 <pre>
 describe('PhoneCat controllers', function() {
 
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   describe('PhoneListCtrl', function(){
     var scope, $browser, ctrl;
 
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     beforeEach(function() {
       ctrl = new PhoneListCtrl();
     });
 
 
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     it('should create "phones" model with 3 phones', function() {
       expect(ctrl.phones.length).toBe(3);
     });
 
 
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     it('should set the default value of orderProp model', function() {
       expect(ctrl.orderProp).toBe('age');
     });
@@ -174,49 +136,37 @@ describe('PhoneCat controllers', function() {
 </pre>
 
 
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 The unit test now verifies that the default ordering property is set.
 
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 We used Jasmine's API to extract the controller construction into a `beforeEach` block, which is
 shared by all tests in the parent `describe` block.
 
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 To run the unit tests, once again execute the `./scripts/test.sh` script and you should see the
 following output.
 
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         Chrome: Runner reset.
         ..
         Total 2 tests (Passed: 2; Fails: 0; Errors: 0) (3.00 ms)
           Chrome 11.0.696.57 Mac OS: Run 2 tests (Passed: 2; Fails: 0; Errors 0) (3.00 ms)
 
 
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 Let's turn our attention to the end-to-end test.
 
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 __`test/e2e/scenarios.js`:__
 <pre>
 ...
     it('should be possible to control phone order via the drop down select box',
         function() {
 
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       // narrow the dataset to make the test assertions shorter
       input('query').enter('tablet');
 
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       expect(repeater('.phones li', 'Phone List').column('a')).
           toEqual(["Motorola XOOM\u2122 with Wi-Fi",
                    "MOTOROLA XOOM\u2122"]);
 
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       select('orderProp').option('alphabetical');
 
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       expect(repeater('.phones li', 'Phone List').column('a')).
           toEqual(["MOTOROLA XOOM\u2122",
                    "Motorola XOOM\u2122 with Wi-Fi"]);
@@ -224,36 +174,26 @@ __`test/e2e/scenarios.js`:__
 ...
 </pre>
 
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 The end-to-end test verifies that the ordering mechanism of the select box is working correctly.
 
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 You can now refresh the browser tab with the end-to-end test runner to see the tests run, or you
 can see them running on {@link
 http://angular.github.com/angular-phonecat/step-4/test/e2e/runner.html
 angular's server}.
 
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 # Experiments
 
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 * In the `PhoneListCtrl` controller, remove the statement that sets the `orderProp` value and
 you'll see that the ordering as well as the current selection in the dropdown menu will default to
 "Alphabetical".
 
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 * Add an `{{orderProp}}` binding into the `index.html` template to display its current value as
 text.
 
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 # Summary
 
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 Now that you have added list sorting and tested the app, go to step 5 to learn about angular
 services and how angular uses dependency injection.
 
 
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 <ul doc:tutorial-nav="4"></ul>
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