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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
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How to call Base Class's __init__ method from the child class? [duplicate]
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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?
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Sorting a vector in descending order
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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(...
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
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Symbolicating iPhone App Crash Reports
I'm looking to try and symbolicate my iPhone app's crash reports.
25 Answers
25
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How to keep one variable constant with other one changing with row in excel
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Use this form:
=(B0+4)/$A$0
The $ tells excel not to adjust that address while pasting the formula into new cells.
Since you are dragging across rows, you really only need to freeze the row part:
=(B0+4)/A$0
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How to check the extension of a filename in a bash script?
I am writing a nightly build script in bash.
Everything is fine and dandy except for one little snag:
9 Answers
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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
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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...