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Do I need to explicitly call the base virtual destructor?
...
Why doesn’t Nick Bolton’s code cause a segmentation fault although it calls the base destructor twice, while calling delete on a pointer to the base class twice does cause a segmentation fault?
– Maggyero
...
Is there any Rails function to check if a partial exists?
...
I was struggling with this too. This is the method I ended up using:
<%= render :partial => "#{dynamic_partial}" rescue nil %>
Basically, if the partial doesn't exist, do nothing. Did you want to print something if the partial is missing, though?
Edit 1: Oh, I fail at reading compr...
Adding Permissions in AndroidManifest.xml in Android Studio?
...the content assist helps you there, so it is pretty easy.
Add this line
<uses-permission android:name="android.permission."/>
and hit ctrl + space after the dot (or cmd + space on Mac). If you need an explanation for the permission, you can hit ctrl + q.
...
Convert timestamp in milliseconds to string formatted time in Java
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And don't forget. Old SimpleDateFormat can't be used multithreaded.
– keiki
Apr 1 '16 at 10:30
to ...
Does ruby have real multithreading?
...ntation of its
own. It is an implementation of a YARV bytecode VM in
JavaScript. HotRuby doesn't support threads (yet?) and when it
does, they won't be able to run in parallel, because JavaScript
has no support for true parallelism. There is an ActionScript
version of HotRuby, however, and Acti...
Facebook Graph API, how to get users email?
...
'app_id' => '{app-id}',
'app_secret' => '{app-secret}',
'default_graph_version' => 'v2.4',
]);
$fb->setDefaultAccessToken($_SESSION['facebook_access_token']);
$response = $fb->get('/me?locale=en_US&fields=name,email');
$userNode = $response->getGraphUser();
var_dump(
...
What's the difference between disabled=“disabled” and readonly=“readonly” for HTML form input fields
... boxes that are not checked.)
Some browsers may override or provide default styling for disabled form elements. (Gray out or emboss text) Internet Explorer
5.5 is particularly nasty about this.
Disabled form elements do not receive focus.
Disabled form elements are skipped in tabbing navigat...
What is the reason behind cbegin/cend?
...
It's quite simple. Say I have a vector:
std::vector<int> vec;
I fill it with some data. Then I want to get some iterators to it. Maybe pass them around. Maybe to std::for_each:
std::for_each(vec.begin(), vec.end(), SomeFunctor());
In C++03, SomeFunctor was free to b...
How do I reflect over the members of dynamic object?
... of ExpandoObject, the ExpandoObject class actually implements IDictionary<string, object> for its properties, so the solution is as trivial as casting:
IDictionary<string, object> propertyValues = (IDictionary<string, object>)s;
Note that this will not work for general dynamic ...
Partly cherry-picking a commit with Git
...ecessary.
To use it in combination with cherry-pick:
git cherry-pick -n <commit> # get your patch, but don't commit (-n = --no-commit)
git reset # unstage the changes from the cherry-picked commit
git add -p # make all your choices (add the changes you do w...