大约有 15,000 项符合查询结果（耗时：0.0310秒） [XML]
What does iterator->second mean?
...
I'm sure you know that a std::vector<X> stores a whole bunch of X objects, right? But if you have a std::map<X, Y>, what it actually stores is a whole bunch of std::pair<const X, Y>s. That's exactly what a map is - it pairs together the keys and t...
How to take a screenshot programmatically on iOS
...reen] respondsToSelector:@selector(scale)]) {
UIGraphicsBeginImageContextWithOptions(self.window.bounds.size, NO, [UIScreen mainScreen].scale);
} else {
UIGraphicsBeginImageContext(self.window.bounds.size);
}
[self.window.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image ...
Can lambda functions be templated?
...released this year and now provides Polymorphic lambdas with the same syntax as in this example. Some major compilers already implement it.
At it stands (in C++11), sadly no. Polymorphic lambdas would be excellent in terms of flexibility and power.
The original reason they ended up being monomor...
Typedef function pointer?
...inition given above.
The difficulty lies in the pointer to functions syntax and readability in C and C++, and the typedef can improve the readability of such declarations. However, the syntax is appropriate, since functions - unlike other simpler types - may have a return value and parameters, thus...
What is Func, how and when is it used
...
That's an extension method which is special.
– Brian Rasmussen
Jan 9 '14 at 16:29
...
.Contains() on a list of custom class objects
... need to implement IEquatable or override Equals() and GetHashCode()
For example:
public class CartProduct : IEquatable<CartProduct>
{
public Int32 ID;
public String Name;
public Int32 Number;
public Decimal CurrentPrice;
public CartProduct(Int32 ID, String Name, Int32 N...
Java client certificates over HTTPS/SSL
...y/Frameworks/JavaVM.framework/Versions/1.6.0/Home/lib/security/cacerts (OSX 10.5).
The name of the keystore file seems to suggest that the client certificate is not supposed to go in there?
...
MySQL - Get row number on select
...
Can you show an example of this? How would I wrap the selects?
– George
Mar 27 '10 at 18:21
9
...
Could not load file or assembly 'xxx' or one of its dependencies. An attempt was made to load a prog
...
Sounds like one part of the project is being built for x86-only while the rest is being built for any CPU/x64. This bit me, too. Are you running an x64 (or uh... IA64)?
Check the project properties and make sure everything is being built for "Any CPU". f you're in Visual Studio,...
How to get Scala List from Java List?
...t.toList.foreach{ node => .... }
works. asScala did not work
In 2.12.x use import scala.collection.JavaConverters._
In 2.13.x use import scala.jdk.CollectionConverters._
share
|
improve this a...