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In C#, why is String a reference type that behaves like a value type?
... @codekaizen Qwertie is right but I think the wording was confusing. One string may be a different size than another string and thus, unlike a true value type, the compiler could not know beforehand how much space to allocate to store the string value. For instance, an Int32 is always 4 bytes,...
Why is it possible to recover from a StackOverflowError?
... catching an Error might be OK in some circumstances. Note that performing one experiment does not demonstrate that something is, in general, safe to do. Only the rules of the Java language and the specifications of the classes you use can do that. A VirtualMachineError is a special class of excepti...
What arguments are passed into AsyncTask?
...tuff you want to do in the background, in a different thread from the main one. Here we have as an input value an array of objects from the type “X” (Do you see in the header? We have “...extends AsyncTask” These are the TYPES of the input parameters) and returns an object from the type “Z...
Why would I ever use push_back instead of emplace_back?
...T with no loss. It is safe in pretty much any situation to pass a T and no one will mind if you make it a U instead. A good example of an implicit constructor is the conversion from std::uint32_t to std::uint64_t. A bad example of an implicit conversion is double to std::uint8_t.
We want to be caut...
What is std::move(), and when should it be used?
...transparently to the programmer. move its only a cast to pass a value from one point to another where the original lvalue will no longer be used.
– Manu343726
Jul 3 '14 at 19:35
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How do I associate file types with an iPhone application?
On the subject of associating your iPhone app with file types.
4 Answers
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When should I really use noexcept?
...e the biggest optimization gains are from user optimizations, not compiler ones due to the possibility of checking noexcept and overloading on it. Most compilers follow a no-penalty-if-you-don't-throw exception handling method, so I doubt it would change much (or anything) on the machine code level ...
What are the mechanics of short string optimization in libc++?
...at is clever. However if libc++ adopts it would require libc++ to give up one other characteristic that I like about its std::string: A default constructed string is all 0 bits. That makes default construction super efficient. And if you're willing to bend the rules, sometimes even free. E.g. y...
Easiest way to rename a model using Django/South?
...ould be great to update your example migration.
– mrooney
Oct 12 '12 at 20:52
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Git: what is a dangling commit/blob and where do they come from?
...= A change that made it to the staging area/index but never got committed. One thing that is amazing with git is that once it gets added to the staging area, you can always get it back because these blobs behave like commits in that they have a hash too!!
Dangling commit = A commit that isn't direc...