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getting exception “IllegalStateException: Can not perform this action after onSaveInstanceState”
...ything works great. I hope this will save you some time.
EDIT: after some more research, this is a known bug in the support package.
If you need to save the instance, and add something to your outState Bundle you can use the following :
@Override
protected void onSaveInstanceState(Bundle outStat...
ObservableCollection not noticing when Item in it changes (even with INotifyPropertyChanged)
...ut it actually doesn't fire when an item is changed. I guess you'll need a more bruteforce method then:
public class CollectionViewModel : ViewModelBase
{
public ObservableCollection<EntityViewModel> ContentList
{
get { return _contentList; }
}
public Collec...
Is the pImpl idiom really used in practice?
...verhead (the resulting code on the client side will be the same).
What is more, with the standard header/implementation separation XClient1.cpp needs to be recompiled even when a private method X::foo() was added to X and X.h changed, even though XClient1.cpp can't possibly call this method for enc...
Measuring execution time of a function in C++
...ing for a function. This is because the CPU of your machine can be less or more used by other processes running on your computer, just as your mind can be more or less concentrated when you solve a math exercise. In the human mind, we can remember the solution of a math problem, but for a computer t...
Use ffmpeg to add text subtitles [closed]
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53
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PHP check whether property exists in object or class
...t have a middle name';
To show how this would look in an if statement for more clarity on how this is working.
if($person->middleName ?? false) {
echo $person->middleName;
} else {
echo 'Person does not have a middle name';
}
Explanation
The traditional PHP way to check for someth...
How do SQL EXISTS statements work?
...ment for EXISTS, because there will be duplicate parent records if there's more than one child record associated to the parent.
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When would you use the different git merge strategies?
...d to specify octopus merge strategy: it is used automatically if you merge more than two branches (git merge A B ...).
– Jakub Narębski
Dec 4 '09 at 18:40
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optional local variables in rails partial templates: how do I get out of the (defined? foo) mess?
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160
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Histogram using gnuplot?
...nd it is often easier to use an external programme (e.g. Octave) to do the more "complicated" calculations, save this data in a file, then use Gnuplot to produce the graph. For the above problem, check out the "hist" function is Octave using [freq,bins]=hist(data), then plot this in Gnuplot using
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