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List of installed gems?
...
Gem::Specification.map {|a| a.name}
However, if your app uses Bundler it will return only list of dependent local gems. To get all installed:
def all_installed_gems
Gem::Specification.all = nil
all = Gem::Specification.map{|a| a.name}
Gem::Specification.reset
...
Why is the Android test runner reporting “Empty test suite”?
...de default constructor for your test class, for example:
package nilzor.myapp.tests;
public class NilzorSomeTest extends ActivityUnitTestCase<ActivityYouWantToTest>{
public NilzorSomeTest(){
super(ActivityYouWantToTest.class);
}
@SmallTest
public void testBlah(){
...
No Persistence provider for EntityManager named
...ger*.jar as stated in Ualter Jrs answer below. I am using a standalone GWT app with hibernate-core-4.3.7.jar, hibernate-entitymanager-4.3.7.Final.jar and hibernate-jpa-2.1-api-1.0.0.jar.
– Andreas Dietrich
Dec 15 '14 at 10:56
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Render a string in HTML and preserve spaces and linebreaks
I have an MVC3 app that has a details page. As part of that I have a description (retrieved from a db) that has spaces and new lines. When it is rendered the new lines and spaces are ignored by the html. I would like to encode those spaces and new lines so that they aren't ignored.
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Laravel - Eloquent or Fluent random row
... updated my answer accordingly.
edit 2: Laravel 5.2 finally implements a wrapper function for this. It's called inRandomOrder().
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how to check if object already exists in a list
...epends on the needs of the specific situation. For example, the dictionary approach would be quite good assuming:
The list is relatively stable (not a lot of inserts/deletions, which dictionaries are not optimized for)
The list is quite large (otherwise the overhead of the dictionary is pointless)....
How do we use runOnUiThread in Android?
...I think I've misunderstood something, because on clicking the button - the app does not respond anymore
12 Answers
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How set background drawable programmatically in Android
...le(context, R.drawable.ready)
You will need to add the following in your app build.gradle
compile 'com.android.support:support-v4:23.0.0' # or any version above
Or using ResourceCompat, in any API like below:
import android.support.v4.content.res.ResourcesCompat;
ResourcesCompat.getDrawable(...
Remove ':hover' CSS behavior from element
...e the :not pseudo-class to exclude the classes you don't want the hover to apply to:
FIDDLE
<div class="test"> blah </div>
<div class="test"> blah </div>
<div class="test nohover"> blah </div>
.test:not(.nohover):hover {
border: 1px solid red;
}
This d...
How to scroll to top of long ScrollView layout?
For part of my app, the user is presented with a list of names and is asked to group them as they see fit.
15 Answers
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