Run the current test:

&lt;kbd&gt;Control&lt;/kbd&gt; + &lt;kbd&gt;Option&lt;/kbd&gt; + &lt;kbd&gt;Command&lt;/kbd&gt; + &lt;kbd&gt;U&lt;/kbd&gt;

Re-Run the last test:

&lt;kbd&gt;Control&lt;/kbd&gt; + &lt;kbd&gt;Option&lt;/kbd&gt; + &lt;kbd&gt;Command&lt;/kbd&gt; + &lt;kbd&gt;G&lt;/kbd&gt;

`control-option-command G` will let you rerun your last test.  So if you run a single test the first time and then keep running it (a common workflow for TDD), that might save you some time ;)

The Xcode key binding preferences for these commands are:

 - Perform Action - Test

 - Perform Action - Test Again

Use those titles to find the commands for re-binding.

I have a data table with a bunch of columns, e.g.:

    dt&lt;-data.table(matrix(runif(10*10),10,10))

I want to perform some operation on the data table, such as producing a correlation matrix (`cor(dt)`). In order to do this, I want to remove a few columns that contain non-numeric values or values outside a certain range.

Let&#39;s say I want to find the correlation matrix excluding V1, V2, V3 and V5. 

Here is my current approach:

    cols&lt;-!(colnames(dt)==&quot;V1&quot; | colnames(dt)==&quot;V2&quot; | colnames(dt)==&quot;V3&quot; | colnames(dt)==&quot;V5&quot;)
    new_dt&lt;-subset(dt,,cols)
    cor(new_dt)

I find this pretty cumbersome, considering data.table syntax is usually so elegant. Is there a better method of doing this?

Select subset of columns in data.table R

I&#39;m testing the new Toolbar and AppCompat theme on Android and ran into a problem. My toolbar title text looks normal-sized on portrait mode but it became rather small on landscape mode although I didn&#39;t do anything in the code to change the title&#39;s text size. Here are the screen shots:

![Portrait][1]
![Landscape][2]

  [1]: http://i.stack.imgur.com/4966L.png
  [2]: http://i.stack.imgur.com/Z0Y2G.png

activity_main.xml:

    &lt;!-- A DrawerLayout is intended to be used as the top-level content view using match_parent for both width and height to consume the full space available. --&gt;
    &lt;LinearLayout
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;
        android:orientation=&quot;vertical&quot;
        xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:tools=&quot;http://schemas.android.com/tools&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
        tools:context=&quot;com.techfunmyanmar.jujaka.ui.MainActivity&quot;&gt;
    
        &lt;android.support.v7.widget.Toolbar
            android:id=&quot;@+id/main_toolbar&quot;
            android:layout_width=&quot;match_parent&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:background=&quot;?attr/colorPrimary&quot;
            app:theme=&quot;@style/ThemeOverlay.AppCompat.Dark.ActionBar&quot;
            app:popupTheme=&quot;@style/ThemeOverlay.AppCompat.Light&quot; /&gt;
    
        &lt;android.support.v4.widget.DrawerLayout
            android:id=&quot;@+id/drawer_layout&quot;
            android:layout_width=&quot;match_parent&quot;
            android:layout_height=&quot;match_parent&quot;&gt;
    
            &lt;!-- As the main content view, the view below consumes the entire
                 space available using match_parent in both dimensions. --&gt;
            &lt;FrameLayout
                android:id=&quot;@+id/container&quot;
                android:layout_width=&quot;match_parent&quot;
                android:layout_height=&quot;match_parent&quot; /&gt;
    
            &lt;!-- android:layout_gravity=&quot;start&quot; tells DrawerLayout to treat
                 this as a sliding drawer on the left side for left-to-right
                 languages and on the right side for right-to-left languages.
                 If you&#39;re not building against API 17 or higher, use
                 android:layout_gravity=&quot;left&quot; instead. --&gt;
            &lt;!-- The drawer is given a fixed width in dp and extends the full height of
                 the container. --&gt;
            &lt;fragment
                android:id=&quot;@+id/navigation_drawer&quot;
                android:name=&quot;com.techfunmyanmar.jujaka.ui.NavigationDrawerFragment&quot;
                android:layout_width=&quot;@dimen/navigation_drawer_width&quot;
                android:layout_height=&quot;match_parent&quot;
                android:layout_gravity=&quot;start&quot;
                tools:layout=&quot;@layout/fragment_navigation_drawer&quot; /&gt;
        &lt;/android.support.v4.widget.DrawerLayout&gt;
    &lt;/LinearLayout&gt;

styles.xml:

    &lt;resources&gt;
        &lt;!-- Base application theme. --&gt;
        &lt;style name=&quot;AppBaseTheme&quot; parent=&quot;Theme.AppCompat.Light.DarkActionBar&quot;&gt;
            &lt;item name=&quot;windowActionBar&quot;&gt;false&lt;/item&gt;
    
            &lt;!-- Customize your theme here. --&gt;
            &lt;item name=&quot;colorPrimary&quot;&gt;@color/primary&lt;/item&gt;
            &lt;item name=&quot;colorPrimaryDark&quot;&gt;@color/primary_dark&lt;/item&gt;
            &lt;item name=&quot;colorAccent&quot;&gt;@color/accent&lt;/item&gt;
    
        &lt;/style&gt;
    
        &lt;!-- Main application theme. --&gt;
        &lt;style name=&quot;AppTheme&quot; parent=&quot;AppBaseTheme&quot;&gt;
    
        &lt;/style&gt;
    
        &lt;style name=&quot;DrawerArrowStyle&quot; parent=&quot;Widget.AppCompat.DrawerArrowToggle&quot;&gt;
            &lt;item name=&quot;spinBars&quot;&gt;true&lt;/item&gt;
        &lt;/style&gt;
    &lt;/resources&gt;



Android Toolbar: small title text in landscape mode

Is there a keyboard shortcut in Xcode 6 to run the current test case under cursor? I know I can press &lt;kbd&gt;Command&lt;/kbd&gt; +  &lt;kbd&gt;u&lt;/kbd&gt; to run all tests. Also, I can tap the test icon located to the left of the test function or tap the icon in &#39;Test Navigator&#39;. Is there a **keyboard shortcut** to run only the single test function under cursor?



Is there a keyboard shortcut in Xcode 6 to run a single current test function under cursor?

<p>Is there a keyboard shortcut in Xcode 6 to run the current test case under cursor? I know I can press <kbd>Command</kbd> +  <kbd>u</kbd> to run all tests. Also, I can tap the test icon located to the left of the test function or tap the icon in 'Test Navigator'. Is there a <strong>keyboard shortcut</strong> to run only the single test function under cursor?</p>


How do I get Xcode to build an OS X app in release mode? I can only seem to find instructions for earlier versions and none of the screenshots match. I didn&#39;t see anything when I put &quot;release&quot; into the help menu&#39;s search.

How do I toggle between Debug and Release builds in Xcode 6 / 7 / 8?

I have a tab bar application and i have a button on my first view which i want to when pressed switch to my second tab programmatically in the tab bar.

I can&#39;t quite seem to figure it out how to get the index etc to switch to it i&#39;ve tried stuff like this.

    tababarController.selectedIndex = 1

With no success.

Switch tab bar programmatically in Swift

I&#39;m installing Crashlytics for my iOS app. I downloaded it via their site link, and went through all the steps for integrating the frameworks, adding the run script, etc. 

I was experiencing an issue, so I removed the frameworks and decided to start over and try a fresh install. But the Fabric app updated to a newer version, and now when I try to reinstall Crashlytics into my app, it doesn&#39;t give me the option to reinstall the frameworks. It goes straight from clicking &quot;install&quot; to the &quot;Build your project&quot; screen, which I cannot pass. 

&gt; To help configure your project, please build it now by pressing ⌘B

I press &lt;kbd&gt;⌘B&lt;/kbd&gt;, it builds and nothing happens. I think the issue is because I removed the Crashlytics and Fabric frameworks from my project, but I can&#39;t see a way to add them back again. The Fabric app doesn&#39;t give me that option.

Crashlytics in iOS won&#39;t proceed past &quot;Build Your Project&quot; in Fabric app

I am currently having difficulty with AutoLayout. I am using interface builder and am trying to position two buttons of equal width side by side as illustrated in the following image.

![objective layout][1]


From the following Preview image, my titleImage has been properly constrained and is displaying correctly however the buttons are not. I have experimented by aligning button 1 with the leading edge of titleImage, and button2 with the trailing edge of titleImage, however the width distribution between the two buttons becomes skewed at this point, as demonstrated below. 

![problem scenario][2]

My objective is to understand what constraints are missing and should be applied to the two buttons to maintain equal widths regardless of device. If possible I would like to achieve this through interface builder as opposed to additional code.

  [1]: http://i.stack.imgur.com/y0Q6Km.png
  [2]: http://i.stack.imgur.com/S2w46m.png

iOS Autolayout: two buttons of equal width, side by side

I get this &quot;**No image found at the path referenced under key &#39;CFBundleIcons&#39;:**&quot; error,![enter image description here][1] even when i have added app icon images in Images.xcastes folder, while uploading my app to appstore. Your immediate response is appreciated. Thanks


  [1]: http://i.stack.imgur.com/LuNbM.png

ERROR ITMS-90032:&quot;Invalid Image Path - No image found at the path referenced under key &#39;CFBundleIcons&#39;:AppIcon40x40&quot;

I have 3 projects in my C# solution.

 - Signatures 
 - Structures 
 - Tests

Signatures have public and internal interfaces. 
Also, it has 
 
      [assembly: InternalsVisibleTo(&quot;Structures&quot;)]
      [assembly: InternalsVisibleTo(&quot;Tests&quot;)]

in AssemblyInfo.cs of.

Structures have public and internal classes and

      [assembly: InternalsVisibleTo(&quot;Tests&quot;)]
    
in AssemblyInfo.cs of.

Tests has next source:

    &lt;packages&gt;
      &lt;package id=&quot;Moq&quot; version=&quot;4.2.1409.1722&quot; targetFramework=&quot;net45&quot; /&gt;
      &lt;package id=&quot;NUnit&quot; version=&quot;2.6.4&quot; targetFramework=&quot;net45&quot; /&gt;
      &lt;package id=&quot;NUnitTestAdapter&quot; version=&quot;1.2&quot; targetFramework=&quot;net45&quot; /&gt;
    &lt;/packages&gt;

as NuGet packages in packages.config.

I wrote an unit test for the internal interface from Signatures and internal class from Structures. Run, and had next result: exception:

**Type Signatures.InterfaceX is not visible to DynamicProxy. Can not create proxy for types that are not accessible. Make the type public, or internal and mark your assembly with [assembly: InternalsVisibleTo(InternalsVisible.ToDynamicProxyGenAssembly2)] attribute.**

Seems logical. I added 
```CSharp
[assembly: InternalsVisibleTo(&quot;InternalsVisible.DynamicProxyGenAssembly2&quot;)] 
```
to assembly info of Signatures and Structures projects. Run, and had next result: exception:

**Type &#39;Castle.Proxies.IReminiscenceableDataTableProxy&#39; from assembly &#39;DynamicProxyGenAssembly2, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null&#39; is attempting to implement an inaccessible interface.**

I expected it would help but it didn&#39;t. 
It only changed the exception message.

How to fix my problem?

How to do internal interfaces visible for Moq?

Mockito - I understand a spy calls the real methods on an object, while a mock calls methods on the double object. Also spies are to be avoided unless there is a code smell.
However, how do spies work and when should i actually use them?
How are they different from mocks?

Mockito - @Spy vs @Mock

I have a function (`foo`) which calls another function (`bar`). If invoking `bar()` raises an `HttpError`, I want to handle it specially if the status code is 404, otherwise re-raise.

I am trying to write some unit tests around this `foo` function, mocking out the call to `bar()`. Unfortunately, I am unable to get the mocked call to `bar()` to raise an Exception which is caught by my `except` block.

Here is my code which illustrates my problem:

    import unittest
    import mock
    from apiclient.errors import HttpError
    
    
    class FooTests(unittest.TestCase):
        @mock.patch(&#39;my_tests.bar&#39;)
        def test_foo_shouldReturnResultOfBar_whenBarSucceeds(self, barMock):
            barMock.return_value = True
            result = foo()
            self.assertTrue(result)  # passes
    
        @mock.patch(&#39;my_tests.bar&#39;)
        def test_foo_shouldReturnNone_whenBarRaiseHttpError404(self, barMock):
            barMock.side_effect = HttpError(mock.Mock(return_value={&#39;status&#39;: 404}), &#39;not found&#39;)
            result = foo()
            self.assertIsNone(result)  # fails, test raises HttpError

        @mock.patch(&#39;my_tests.bar&#39;)
        def test_foo_shouldRaiseHttpError_whenBarRaiseHttpErrorNot404(self, barMock):
            barMock.side_effect = HttpError(mock.Mock(return_value={&#39;status&#39;: 500}), &#39;error&#39;)
            with self.assertRaises(HttpError):  # passes
                foo()
    
    def foo():
        try:
            result = bar()
            return result
        except HttpError as error:
            if error.resp.status == 404:
                print &#39;404 - %s&#39; % error.message
                return None
            raise
    
    def bar():
        raise NotImplementedError()

I followed the [Mock docs](http://www.voidspace.org.uk/python/mock/index.html#quick-guide) which say that you should set the `side_effect` of a `Mock` instance to an `Exception` class to have the mocked function raise the error.

I also looked at some other related StackOverflow Q&amp;As, and it looks like I am doing the same thing they are doing to cause and Exception to be raised by their mock.

- https://stackoverflow.com/a/10310532/346561
- https://stackoverflow.com/q/20547038/346561

Why is setting the `side_effect` of `barMock` not causing the expected `Exception` to be raised? If I am doing something weird, how should I go about testing logic in my `except` block?

Mocking a function to raise an Exception to test an except block

AngularJS v1.2.26

Jasmine v2.2.0

How can I change or remove the behavior of a `spyOn`? When I try to override it, I get the following error: `	Error: getUpdate has already been spied upon`

    var data1 = &#39;foo&#39;;
    var data2 = &#39;bar&#39;;
    
    describe(&quot;a spec with a spy&quot;, function(){
    
        beforeEach(module(&#39;app&#39;));
    
        var $q;
    
        beforeEach(inject(function(_updateService_, _$q_){
            updateService = _updateService_;
    
            //spy the results of the getUpdate()
            $q = _$q_;
            var deferred = $q.defer();
            deferred.resolve( data1 );
            spyOn(updateService, &#39;getUpdate&#39;).and.returnValue(deferred.promise);
    
        }));
    
        describe(&#39;and here the spy should be different&#39;, function() {
    
            it(&#39;returns a different value&#39;, function() {
    
              var deferred = $q.defer();
              deferred.resolve( data2 );
              spyOn(updateService, &#39;getUpdate&#39;); //ERROR HERE
              updateService.getUpdate.and.returnValue(deferred.promise);
    
              ...
    
            });
        });

    ...

When I remove the second spyOn the test doesn&#39;t work.

How do I do this?

Angular unit testing with Jasmine: how to remove or modify spyOn

We have a test suite that primarily uses JUnit assertions with Hamcrest matchers. One of our team started experimenting with [AssertJ][1] and impressed people with its syntax, flexibility and declarative-ness. There is one feature that JUnit provides that I can&#39;t find an equivalent for in AssertJ: adding a custom assert failure message.

We&#39;re often comparing objects that are not made for human readability and will have random-seeming Ids or UUIDs and it&#39;s impossible to tell what they&#39;re supposed to be by the data they contain. This is an unavoidable situation for our codebase, sadly, as part of the purpose it fulfills is mapping data between other services without necessarily understanding what it is.

In JUnit, the [`assertThat`][2] method provides a version with a `String reason` parameter before the `Matcher&lt;T&gt;` param. This makes it trivial to add a short debug string shedding some light on the problem, like what the comparison should mean to a human.

AssertJ, on the other hand, provides a jillion different [genericized `static assertThat`][3] methods which return some form of [interface Assert][4] or one of its many implementing classes. This interface does not provide a standard way of setting a custom message to be included with failures.

Is there any way to get this functionality from the AssertJ API or one of its extensions without having to [create a custom assert class for every assert type][5] we want to add messages to?


  [1]: http://joel-costigliola.github.io/assertj/
  [2]: http://junit.org/apidocs/org/junit/Assert.html#assertThat(java.lang.String,%20T,%20org.hamcrest.Matcher)
  [3]: http://joel-costigliola.github.io/assertj/core/api/org/assertj/core/api/Assertions.html#assertThat(org.assertj.core.api.AssertProvider)
  [4]: http://joel-costigliola.github.io/assertj/core/api/org/assertj/core/api/Assert.html
  [5]: http://joel-costigliola.github.io/assertj/assertj-core-custom-assertions.html

Can you add a custom message to AssertJ assertThat?

How can i make i circle picture with swift ?

My ViewController :

    import UIKit
    import Foundation
    
    class FriendsViewController : UIViewController{
        
        @IBOutlet weak var profilPicture: UIImageView!
        
        override func viewDidLoad() {
            super.viewDidLoad()
            profilPicture = UIImageView(frame: CGRectMake(0, 0, 100, 100))
        }
    }

My `profilPicture = UIImageView(frame: CGRectMake(0, 0, 100, 100))` do nothing ..

Exemple: http://www.appcoda.com/ios-programming-circular-image-calayer/

How to set image in circle in swift

Trying to make an app launch the default browser to a URL, but only if the URL entered is valid, otherwise it displays a message saying the URL is invalid.

How would I go about checking the validity using Swift?

How to check validity of URL in Swift?

I&#39;m using ActionSheet in my application. On my iPhone it works, but it doesn&#39;t on the iPad simulator. 

this is my code: 

    @IBAction func dialog(sender: AnyObject) {
        
        let optionMenu = UIAlertController(title: nil, message: &quot;Choose Option&quot;, preferredStyle: .ActionSheet)
        let deleteAction = UIAlertAction(title: &quot;Delete&quot;, style: .Default, handler: {
    
            (alert: UIAlertAction!) -&gt; Void in
            println(&quot;Filtre Deleted&quot;)
        })
        
        let cancelAction = UIAlertAction(title: &quot;Cancel&quot;, style: .Cancel, handler: {
            (alert: UIAlertAction!) -&gt; Void in
            println(&quot;Cancelled&quot;)
        })
        
        optionMenu.addAction(deleteAction)
        optionMenu.addAction(cancelAction)
        
        self.presentViewController(optionMenu, animated: true, completion: nil)
    }

And my error:

&gt; Terminating app due to uncaught exception &#39;NSGenericException&#39;,
&gt; reason: &#39;Your application has presented a UIAlertController
&gt; (&lt;UIAlertController: 0x7f937a7868b0&gt;) of style
&gt; UIAlertControllerStyleActionSheet. The modalPresentationStyle of a
&gt; UIAlertController with this style is UIModalPresentationPopover. You
&gt; must provide location information for this popover through the alert
&gt; controller&#39;s popoverPresentationController. You must provide either a
&gt; sourceView and sourceRect or a barButtonItem.  If this information is
&gt; not known when you present the alert controller, you may provide it in
&gt; the UIPopoverPresentationControllerDelegate method
&gt; -prepareForPopoverPresentation.&#39;



ActionSheet not working iPad

Is there an API to convert most possible String representations of Boolean values (e.g. &quot;True&quot;, &quot;true&quot;, &quot;False&quot;, &quot;false&quot;, &quot;yes&quot;, &quot;no&quot;, &quot;1&quot;, &quot;0&quot;) into a Bool in Swift?

If not, what would be the most Swift-like approach to coding this from scratch? Would it be a functional map() operation? Or something else?

The original source data in this instance is JSON, but I&#39;m interested in the crux of solving the problem in the most Swift-like way possible and hence learning more about the language in the process.

Content Type	Original Author	Original Content on Stackoverflow
Question	Evgenii	View Question on Stackoverflow
Solution 1 - Xcode	sbstjn	View Answer on Stackoverflow
Solution 2 - Xcode	Plastech	View Answer on Stackoverflow
Solution 3 - Xcode	pkamb	View Answer on Stackoverflow

Is there a keyboard shortcut in Xcode 6 to run a single current test function under cursor?

Xcode Problem Overview

Xcode Solutions

Solution 1 - Xcode

Solution 2 - Xcode

Solution 3 - Xcode

Android Toolbar: small title text in landscape mode

Select subset of columns in data.table R

Attributions