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@class vs. #import
...(really, just a pointer). Thus, in your header, @class suffices 90% of the time.
However, if you ever need to create or access myObject's members, you'll need to let the compiler know what those methods are. At this point (presumably in your implementation file), you'll need to #import "MyCoolClass...
Understanding Python super() with __init__() methods [duplicate]
...bly causing a logical failure (in the answerer's example, it does) or a RuntimeError when the recursion depth is exceeded.
>>> class Polygon(object):
... def __init__(self, id):
... self.id = id
...
>>> class Rectangle(Polygon):
... def __init__(self, id, width, he...
How to exclude certain messages by TAG name using Android adb logcat?
Logcat allows filtering logs but it works like that: You define filters and logcat only displays messages which matches filters. But is there a way to display all logs EXCEPT some TAGs defined by filters?
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Convert InputStream to byte array in Java
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There are some other flavors of this method, but I use this all the time for this use case.
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How to generate random number in Bash?
...ding. It might be worth mentioning that srand() 's seed is the current CPU time. If you need to specify a specific seed, so RNG can be duplicated, use srand(x) where x is the seed. Also, quoted from GNU awk's numeric function manual, "different awk implementations use different random-number generat...
Why doesn't C# support the return of references?
... it to show to other internal teams to get their feedback. However at this time based on our research we believe that the feature does not have broad enough appeal or compelling usage cases to make it into a real supported language feature. We have other higher priorities and a limited amount of tim...
Which kind of pointer do I use when?
Ok, so the last time I wrote C++ for a living, std::auto_ptr was all the std lib had available, and boost::shared_ptr was all the rage. I never really looked into the other smart pointer types boost provided. I understand that C++11 now provides some of the types boost came up with, but not all ...
getting exception “IllegalStateException: Can not perform this action after onSaveInstanceState”
...all to .super() and everything 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 onSaveInst...
How do I add a placeholder on a CharField in Django?
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Most of the time I just wish to have all placeholders equal to the verbose name of the field defined in my models
I've added a mixin to easily do this to any form that I create,
class ProductForm(PlaceholderMixin, ModelForm):
class M...
Batch equivalent of Bash backticks
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You could always run Bash inside Windows. I do it all the time with MSYS (much more efficient than Cygwin).
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