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Weak and strong property setter attributes in Objective-C
...s the parent so neither is ever released).
The 'toll free bridging' part (casting from NS to CF) is a little tricky. You still have to manually manage CFRelease() and CFRetain() for CF objects. When you convert them back to NS objects you have to tell the compiler about the retain count so it kno...
Does const mean thread-safe in C++11?
...thread-safe since no writes are possible (and if you are considering const_cast-ing something originally declared const then you get undefined-behavior and that's it).
So what does it mean then?
Let's assume --for the sake of argument-- that multiplication operations are extremely costly and we be...
How to iterate over rows in a DataFrame in Pandas
...'B'], ...) instead of df[['A', 'B']].to_numpy() as the latter implicitly upcasts data to the most common type. As an example if A is numeric and B is string, to_numpy() will cast the entire array to string, which may not be what you want. Fortunately zipping your columns together is the most straigh...
C pointers : pointing to an array of fixed size
...ill, nothing prevents you or an incompetent or malevolent coder from using casts to fool the compiler into treating your struct as one of a different size. The almost unshackled ability to do this kind of thing is a part of C's design.
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Is unsigned integer subtraction defined behavior?
...ake sure that the result is signed, then stored it into signed variable or cast it to signed. When you want to get the difference between numbers and make sure that the modular arithmetic will not be applied, then you should consider using abs() function defined in stdlib.h:
int c = five - seven; ...
How to correctly implement custom iterators and const_iterators?
...fining a copy constructor that is template, it won't compile if you try to cast the underlying type from const to non-const.
– Matthieu M.
Aug 27 '10 at 9:48
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Creating an index on a table variable
...lly works:
declare @cmd varchar(500)='CREATE NONCLUSTERED INDEX [ix_temp'+cast(newid() as varchar(40))+'] ON #temp (NonUniqueIndexNeeded);';
exec (@cmd);
This insures the name is always unique even between simultaneous executions of the same procedure.
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Change column type from string to float in Pandas
...not (e.g. they contain non-digit strings or dates) will be left alone.
Downcasting
By default, conversion with to_numeric() will give you either a int64 or float64 dtype (or whatever integer width is native to your platform).
That's usually what you want, but what if you wanted to save some memory a...
Line-breaking widget layout for Android
...
For some reason I'm getting "ClassCastException android.view.view cannot be cast to android.view.viewgroup" when trying to inflate the view in the Android layout editor. Any idea on how to fix this?
– twig
Dec 18 '11 at ...
Is there a constraint that restricts my generic method to numeric types?
...
Use decimal for everything and cast back to the type you need.
– jjxtra
Jul 22 at 20:41
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