大约有 11,700 项符合查询结果（耗时：0.0264秒） [XML]
How can I add reflection to a C++ application?
...trospect a C++ class for its name, contents (i.e. members and their types) etc. I'm talking native C++ here, not managed C++, which has reflection. I realise C++ supplies some limited information using RTTI. Which additional libraries (or other techniques) could supply this information?
...
(13: Permission denied) while connecting to upstream:[nginx]
...
Check the user in /etc/nginx/nginx.conf
Change ownership to user.
sudo chown -R nginx:nginx /var/lib/nginx
Now see the magic.
share
|
impr...
Should you ever use protected member variables?
...like:
template <typename T, typename TContainer>
class Base
{
// etc.
protected
TContainer container ;
}
template <typename Key, typename T>
class DerivedMap : public Base<T, std::map<Key, T> > { /* etc. */ }
template <typename Key, typename T>
clas...
What is the real overhead of try/catch in C#?
...
When an exception is thrown in addition to the stack unwinding operations etc that take place which others have mentioned you should be aware that a whole bunch of runtime/reflection related stuff happens in order to populate the members of the exception class such as the stack trace object and the...
ssh: Could not resolve hostname [hostname]: nodename nor servname provided, or not known
...c to your Raspberry inside your local network, do this: On your Mac, edit /etc/hosts. Assuming the Raspberry has hostname "berry" and ip "172.16.0.100", add one line:
# ip hostname
172.16.0.100 berry
Now: ssh user@berry should work.
...
What is a Windows Handle?
...at is managed by the Windows kernel. A handle can be to a window, a file, etc.
Handles are simply a way of identifying a particulate resource that you want to work with using the Win32 APIs.
So for instance, if you want to create a Window, and show it on the screen you could do the following:
//...
pip install mysql-python fails with EnvironmentError: mysql_config not found
...e path, but I think you're better off adding it permanently (ie add it to /etc/paths) if you plan to install MySQL-python in another environment.
(tested in OSX Mountain Lion)
share
|
improve this ...
Is using a lot of static methods a bad thing?
...ons this isn't possible (e.g., regular class code generation from XSD/WSDL/etc), or it will make the class very long, and transformation methods can often be a real pain for complex objects and you just want them in their own separate class. So yeah, I have static methods in utility classes.
...
Error-Handling in Swift-Language
...eyword) which let you achieve the same effect as finally blocks in Java/C#/etc
guard statement (using guard keyword) which let you write little less if/else code than in normal error checking/signaling code.
Swift 1
Runtime errors:
As Leandros suggests for handling runtime errors (like network...
Bash Script : what does #!/bin/bash mean? [duplicate]
... unix shell, which might be bash or any other variant like ksh, dash, zsh, etc
– Karthik T
Dec 14 '12 at 3:10
When bas...