大约有 6,700 项符合查询结果(耗时:0.0301秒) [XML]

https://stackoverflow.com/ques... 

What's the absurd function in Data.Void useful for?

...l g (Var a) = g a eval g (f :$ s) = eval g f $$ eval g s where (b :$$ vs) $$ v = b :$$ (vs ++ [v]) -- stuck application gets longer LV g t $$ v = eval (maybe v g) t -- an applied lambda gets unstuck eval g (Lam t) = LV g t You guessed it. To evaluate a closed term a...
https://stackoverflow.com/ques... 

What's the difference between the atomic and nonatomic attributes?

...). Assuming that you are @synthesizing the method implementations, atomic vs. non-atomic changes the generated code. If you are writing your own setter/getters, atomic/nonatomic/retain/assign/copy are merely advisory. (Note: @synthesize is now the default behavior in recent versions of LLVM. Th...
https://stackoverflow.com/ques... 

Difference between std::system_clock and std::steady_clock?

... steady clock simply by checking is_steady and behave accordingly. However VS2012 seems to cheat a bit here :-) If you need high precision clock I recommend for now writing your own clock that conforms to C++11 official clock interface and wait for implementations to catch up. It will be much bette...
https://stackoverflow.com/ques... 

What are best practices that you use when writing Objective-C and Cocoa? [closed]

...precision arithmetic as opposed to single precision. References: Double vs float on the iPhone iPhone/iPad double precision math On the older phones supposedly calculations operate at the same speed but you can have more single precision components in registers than doubles, so for many calcula...
https://stackoverflow.com/ques... 

what is the difference between a portlet and a servlet?

...cle, configuration, deployment, etc. The main difference between portlet vs. servlet could be that while servlet always responds to single type of action - request, portlet (due to nature of its life cycle and stronger container bindings) has to respond to two types of actions: render and request....
https://stackoverflow.com/ques... 

Why '&&' and not '&'?

... Logical operator (|| and &&) vs. bitwise operator (| and &). The most crucial difference between a logical operator and bitwise operator is that a logical operator takes two booleans and produces a boolean while a bitwise operator takes two integers...
https://stackoverflow.com/ques... 

Difference between __str__ and __repr__?

...ng debuggers). I'd just like to add a link to this other Q&A about str vs unicode in Python 3 which could be relevant to the discussion for people who have made the switch. – ThatAintWorking Mar 23 '15 at 21:04 ...
https://stackoverflow.com/ques... 

When to use volatile with multi threading?

... said is correct, end of story. It has nothing to do with application code vs library code, or "ordinary" vs "god-like omniscient programmers" for that matter. volatile is unnecessary and useless for synchronization between threads. Threading libraries can't be implemented in terms of volatile; it h...
https://stackoverflow.com/ques... 

How is “=default” different from “{}” for default constructor and destructor?

..."Then the =default solution will compile" No it will not. Just tested in vs. – Minimus Heximus Jan 31 '19 at 11:23 1 ...
https://stackoverflow.com/ques... 

How to handle many-to-many relationships in a RESTful API?

...ho is on team 1 # or simply checking whether player 3 is on that team (200 vs. 404) GET /teams/1/players/3 # getting player 3 who is also on team 3 GET /teams/3/players/3 # adding player 3 also to team 2 PUT /teams/2/players/3 # getting all teams of player 3 GET /players/3/teams # withdraw playe...