大约有 32,000 项符合查询结果（耗时：0.0512秒） [XML]
Shorthand way for assigning a single field in a record, while copying the rest of the fields?
...a Foo = Foo { a :: Int, b :: Int , c :: String }
test = Foo 1 2 "Hello"
Then:
setL c "Goodbye" test
would update field 'c' of 'test' to your string.
share
|
improve this answer
|
...
Why would you use an ivar?
...urely synthetic and you will never notice that in a real application. Okay then, let's try a real world sample.
The code following below defines Account objects. An account has properties that describe name (NSString *), gender (enum), and age (unsigned) of its owner, as well as a balance (int64_t...
The difference between the Runnable and Callable interfaces in Java
...ere does this really apply.
Runnable : If you have a fire and forget task then use Runnable. Put your code inside a Runnable and when the run() method is called, you can perform your task. The calling thread really does not care when you perform your task.
Callable : If you are trying to retrieve ...
What does void mean in C, C++, and C#?
...ad mylist;
.worker_func = bar;
.data = somedata;
} deferred_work;
Then a kernel thread goes over a list of deferred work and when it get's to this node it effectively executes:
bar(somedata);
Then in bar you have:
void bar(void* mydata) {
int *data = mydata;
/* do something with...
How do I build a graphical user interface in C++? [closed]
...ly with some kind of special "sleep" or "select" or "yield" function call)
then the yield function will return when the operating system is done, and you have another go around the loop.
There are plenty of resources about event based programming. If you have any experience with JavaScript, it's t...
How do I create/edit a Manifest file?
...ject.
Right click your project file on the Solution Explorer, select Add, then New item (or CTRL+SHIFT+A). There you can find Application Manifest File.
The file name is app.manifest.
share
|
impr...
Clone() vs Copy constructor- which is recommended in java [duplicate]
...ric classes and functions to only accept classes that implement Cloneable, then simply call clone(). Without it, I don't believe there is a (good) way to enforce that and you would likely resort to reflection to discover a class's copy constructor. That also makes the assumption that if Foo has a co...
“Failed to load platform plugin ”xcb“ ” while launching qt5 app on linux without qt installed
...h ldd as was suggested here, and "satisfied" all "not found" dependencies. Then this notorious This application failed to start because it could not find or load the Qt platform plugin "xcb" error was thrown.
How to resolve this in Linux
Firstly you should create platforms directory where your binar...
HTML5 Local Storage fallback solutions [closed]
... is it allowed in JavaScript to define var expires locally and then user in other scope? in function set
– happy_marmoset
Nov 12 '13 at 13:44
3
...
Is there a “null coalescing” operator in JavaScript?
...t it has no short-circuit evaluation; if your arguments are function calls then they will all be evaluated regardless of whether their value is returned, which differs from the behaviour of the logical OR operator, so is worth noting.
– Haravikk
Nov 15 '17 at 1...