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What's the difference between ContentControl and ContentPresenter?
...for controls that contain other elements and have a Content-property (for example, Button).
ContentPresenter is used inside control templates to display content.
ContentControl, when used directly (it's supposed to be used as a base class), has a control template that uses ContentPresenter to disp...
Use of 'const' for function parameters
...st when necessary or do you go the whole hog and use it everywhere? For example, imagine a simple mutator that takes a single boolean parameter:
...
Composer: how can I install another dependency without updating old ones?
...nstall the package, and add it to composer.lock.
You can also specify an explicit version constraint by running:
composer require new/package ~2.5
–OR–
Using the update command, add the new package manually to composer.json, then run:
composer update new/package
If Composer complains,...
CSS content property: is it possible to insert HTML instead of Text?
...interpreted as markup, regardless of the document language in use.
As an example, using the given CSS with the following HTML:
<h1 class="header">Title</h1>
... will result in the following output:
<a href="#top">Back</a>Title
...
What are the best practices for JavaScript error handling?
... catch , finally , and throw , but I'm not finding a ton of advice from experts on when and where to throw errors.
5 Answ...
Version vs build in Xcode
I have an app that I developed with Xcode 3 and recently started editing with Xcode 4. In the target summary I have the iOS application target form with fields: identifier, version, build, devices, and deployment target. The version field is blank and the build field is 3.4.0 (which matches the vers...
Difference between objectForKey and valueForKey?
...nary method. An NSDictionary is a collection class similar to an NSArray, except instead of using indexes, it uses keys to differentiate between items. A key is an arbitrary string you provide. No two objects can have the same key (just as no two objects in an NSArray can have the same index).
val...
Fragment onCreateView and onActivityCreated called twice
...
I was scratching my head about this for a while too, and since Dave's explanation is a little hard to understand I'll post my (apparently working) code:
private class TabListener<T extends Fragment> implements ActionBar.TabListener {
private Fragment mFragment;
private Activity mA...
Converting an array of objects to ActiveRecord::Relation
... data.
However, if what you want is a relation then:
for ActiveRecord 3.x, don’t call all and instead call scoped, which will give back a Relation which represents the same records that all would give you in an Array.
for ActiveRecord 4.x, simply call all, which returns a Relation.
When ru...