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scoped_ptr 与 auto_ptr 与 shared_ptr 区别总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...lude <memory>
#include <iostream>
using std::tr1::shared_ptr;
class Foo
{
public:
Foo()
{
std::cout<<"new Foo()"<<std::endl;
i = 0;
}
~Foo()
{
std::cout<<"destroy Foo()"<<std::endl;
}
void print()
{
std::cout<<"Foo::print"<<std::endl;
}
int i;
};
void...
What does static_assert do, and what would you use it for?
...fined (as one would expect in a C++ library).
Contrast with having to actually compile SomeLibrary and your code, link everything, and run the executable only then to find out that you spent 30 minutes compiling an incompatible version of SomeLibrary.
@Arak, in response to your comment: yes, you ...
How does Django's Meta class work?
I am using Django which allows people to add extra parameters to a class by using class Meta .
6 Answers
...
Can I specify multiple users for myself in .gitconfig?
...
You can manually edit those config files with git config --edit and git config --global --edit. And in case you missed Abizern’s comment, a repository’s config file is at <repo-root>/.git/config.
– Rory O'...
Filter by process/PID in Wireshark
...
I don't see how. The PID doesn't make it onto the wire (generally speaking), plus Wireshark allows you to look at what's on the wire - potentially all machines which are communicating over the wire. Process IDs aren't unique across different machines, anyway.
...
Disable assertions in Python
...trate each.
For the whole process
Using the -O flag (capital O) disables all assert statements in a process.
For example:
$ python -Oc "assert False"
$ python -c "assert False"
Traceback (most recent call last):
File "<string>", line 1, in <module>
AssertionError
Note that by di...
How do I pipe or redirect the output of curl -v?
...
What information are you actually trying to extract, and what information do you want to throw away. I understood your question to mean that you want all of the output of -v directed to stdout.
– SingleNegationElimination
...
How do I get the path to the current script with Node.js?
...
So basically you can do this:
fs.readFile(path.resolve(__dirname, 'settings.json'), 'UTF-8', callback);
Use resolve() instead of concatenating with '/' or '\' else you will run into cross-platform issues.
Note: __dirname is the l...
What is the use of static constructors?
...required configuration data into readonly fields, etc.
It is run automatically by the runtime the first time it is needed (the exact rules there are complicated (see "beforefieldinit"), and changed subtly between CLR2 and CLR4). Unless you abuse reflection, it is guaranteed to run at most once (eve...
How to append contents of multiple files into one file
... should be >> right ? and also why is there a newline before all the text in my 0.txt file ?
– Steam
Aug 2 '13 at 0:00
2
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