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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; ...
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...
C++11 rvalues and move semantics confusion (return statement)
...emporary created on the return line. move doesn't create a temporary. It casts an lvalue to an xvalue, making no copies, creating nothing, destroying nothing. That example is the exact same situation as if you returned by lvalue-reference and removed the move from the return line: Either way you...
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 ...
What's the difference between window.location= and window.location.replace()?
...f = "#/some/spa/route". Besides, many language would allow (implicit) type cast in some way. At the end of day, javascript is a dynamic typed language, put type concepts on it and say it's not good makes no point afaict.
– apple apple
May 6 '19 at 9:15
...
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...
How to design a database for User Defined Fields?
...r to json. It features a typesave interface to read and write data without casting and with great programming language integration. That's really great. It has the same problem as all of this kind of "documents" in databases. It's hard to query for spcific values and it cannot easily reference data ...
When to use symbols instead of strings in Ruby?
...Printing the symbols will be slower than printing strings because they are cast to strings.
Having lots of different symbols will increase the overall memory usage of your application since they are never deallocated. And you are never using all strings from your code at the same time.
Use case b...
When should I use C++14 automatic return type deduction?
...n expressions they are usually implicit but we can make them explicit with casts". C++11 and C++1y introduce type deduction tools so that you can leave out the type in new places.
Sorry, but you're not going to solve this up front by making general rules. You need to look at particular code, and de...
How to retrieve form values from HTTPPOST, dictionary or?
...e" (name is as you like but keep it consistent) and try to build it up and cast it to MyModel.
[HttpPost]
public ActionResult PostBack(HomeModel variableName){
postBack.HouseNumber; //The value user entered
postBack.StreetAddress; //the default value of NULL.
}
When a controller is expec...