大约有 11,500 项符合查询结果（耗时：0.0272秒） [XML]
Differences between std::make_unique and std::unique_ptr with new
Does std::make_unique have any efficiency benefits like std::make_shared ?
4 Answers
...
How to cast Object to its actual type?
...
If you know the actual type, then just:
SomeType typed = (SomeType)obj;
typed.MyFunction();
If you don't know the actual type, then: not really, no. You would have to instead use one of:
reflection
implementing a well-known interface
dynamic
For example:
// reflection
obj.GetType().Get...
Symbolicating iPhone App Crash Reports
I'm looking to try and symbolicate my iPhone app's crash reports.
25 Answers
25
...
Checking if a variable is defined?
How can I check whether a variable is defined in Ruby? Is there an isset -type method available?
14 Answers
...
How to call Base Class's __init__ method from the child class? [duplicate]
...
You could use super(ChildClass, self).__init__()
class BaseClass(object):
def __init__(self, *args, **kwargs):
pass
class ChildClass(BaseClass):
def __init__(self, *args, **kwargs):
super(ChildClass, self).__init__(*args, **kwargs)
Your indentation is i...
Convert decimal to binary in python [duplicate]
...s there any module or function in python I can use to convert a decimal number to its binary equivalent?
I am able to convert binary to decimal using int('[binary_value]',2), so any way to do the reverse without writing the code to do it myself?
...
Sorting a vector in descending order
...
Actually, the first one is a bad idea. Use either the second one, or this:
struct greater
{
template<class T>
bool operator()(T const &a, T const &b) const { return a > b; }
};
std::sort(numbers.begin(), numbers.end(), greater(...
How to set an iframe src attribute from a variable in AngularJS
I'm trying to set the src attribute of an iframe from a variable and I can't get it to work...
6 Answers
...
C++ Lock-free Hazard Pointer（冒险指针） - C/C++ - 清泛网 - 专注C/C++及内核技术
...omic>
#include <memory>
template <class T>
class ReferenceCount {
public:
ReferenceCount(std::unique_ptr<T> ptr) : ptr_(std::move(ptr)), cnt_(1) {}
T *Ptr() const { return ptr_.get(); }
ReferenceCount *Ref() {
++cnt_;
return this;
}
void Deref() {
if (--cnt...
Programmatically generate video or animated GIF in Python?
...ate a video from. Ideally I could specify a frame duration for each frame but a fixed frame rate would be fine too. I'm doing this in wxPython, so I can render to a wxDC or I can save the images to files, like PNG. Is there a Python library that will allow me to create either a video (AVI, MPG, e...