大约有 15,000 项符合查询结果（耗时：0.0267秒） [XML]
Nested select statement in SQL Server
...ch are greater than the minimum value of the list. The
e.g. >ANY(100,200,300), the ANY operator will fetch all the values greater than 100.
ALL – [>ALL or ALL operator takes the list of values produced by the inner query and fetches all the values which are greater than the maximum of t...
Check for internet connection availability in Swift
...e = response as? NSHTTPURLResponse {
if httpResponse.statusCode == 200 {
Status = true
}
}
return Status
}
}
And then you can check internet connection anywhere in your project using this code:
if Reachability.isConnectedToNetwork() == true {
println("I...
When should I really use noexcept?
...
@Pubby C++ exception handling is usually done with no overhead except jump tables which map potentially throwing call site addresses to handler entry points. Removing those tables is as close as it gets to removing exception handlin...
Programmatically generate video or animated GIF in Python?
...fp_out, format='GIF', append_images=imgs,
save_all=True, duration=200, loop=0)
See docs: https://pillow.readthedocs.io/en/stable/handbook/image-file-formats.html#gif
share
|
improve this ...
static constructors in C++? I need to initialize private static objects
...public:
StaticStuff()
{
for (char c = 'a'; c <= 'z'; c++)
letters_.push_back(c);
}
// provide some way to get at letters_
};
class Elsewhere
{
static StaticStuff staticStuff; // constructor runs once, single instance
};
...
Why do objects of the same class have access to each other's private data?
...
Because that's how it works in C++. In C++ access control works on per-class basis, not on per-object basis.
Access control in C++ is implemented as a static, compile-time feature. I think it is rather obvious that it is not really possible to implement a...
What's the best way to put a c-struct in an NSArray?
...w collection type =) std::vector (for example) is more suited to holding C/C++ types, structs and classes than NSArray. By using an NSArray of NSValue, NSData, or NSDictionary types, you're losing a lot of type-safety while adding a ton of allocations and runtime overhead. If you want to stick with ...
How to throw a C++ exception
...wered, I just want to add a note on how to do proper exception handling in C++11:
Use std::nested_exception and std::throw_with_nested
It is described on StackOverflow here and here, how you can get a backtrace on your exceptions inside your code without need for a debugger or cumbersome logging, ...
How to initialize private static members in C++?
What is the best way to initialize a private, static data member in C++? I tried this in my header file, but it gives me weird linker errors:
...
Git Blame Commit Statistics
...ason. This just worked out of the box. Took something like 30 seconds for ~200k lines spread across a few hundred files.
– fgblomqvist
Jan 30 at 19:04
add a comment
...