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Why is Thread.Sleep so harmful
...s for timing.
Threads are a limited resource, they take approximately 200,000 cycles
to create and about 100,000 cycles to destroy. By default they
reserve 1 megabyte of virtual memory for its stack and use 2,000-8,000
cycles for each context switch. This makes any waiting thread a
hug...
Applying function with multiple arguments to create a new pandas column
...(df['A'], df['B'])
>>> df
A B new_column
0 10 20 200
1 20 30 600
2 30 10 300
or vectorize arbitrary function in general case:
>>> def fx(x, y):
... return x*y
...
>>> df['new_column'] = np.vectorize(fx)(df['A'], df['B'])
>>...
Catch All Bugs with BugTrap! - 开源 & Github - 清泛网移动版 - 专注C++内核技术
... design lets BugTrap support pure managed .NET assemblies as well as mixed C++ assemblies that could throw managed .NET exceptions and native Win32/64 exceptions.
BugTrap for .NET exposes both managed and unmanaged (native) interfaces. Managed interface is accessible from C# or VB.NET code:
Exce...
Catch All Bugs with BugTrap! - 开源 & Github - 清泛网移动版 - 专注C++内核技术
... design lets BugTrap support pure managed .NET assemblies as well as mixed C++ assemblies that could throw managed .NET exceptions and native Win32/64 exceptions.
BugTrap for .NET exposes both managed and unmanaged (native) interfaces. Managed interface is accessible from C# or VB.NET code:
Exce...
Catch All Bugs with BugTrap! - 开源 & Github - 清泛网移动版 - 专注C++内核技术
... design lets BugTrap support pure managed .NET assemblies as well as mixed C++ assemblies that could throw managed .NET exceptions and native Win32/64 exceptions.
BugTrap for .NET exposes both managed and unmanaged (native) interfaces. Managed interface is accessible from C# or VB.NET code:
Exce...
Adding a background image to a element
...t;div style="background-image: url(../images/test-background.gif); height: 200px; width: 400px; border: 1px solid black;">Example of a DIV element with a background image:</div>
<div style="background-image: url(../images/test-background.gif); height: 200px; width: 400px; border: 1px sol...
Calling C++ class methods via a function pointer
...NULL
int (TMyClass::*pt2ConstMember)(float, char, char) const = NULL;
// C++
class TMyClass
{
public:
int DoIt(float a, char b, char c){ cout << "TMyClass::DoIt"<< endl; return a+b+c;};
int DoMore(float a, char b, char c) const
{ cout << "TMyClass::DoMore" <<...
C99 stdint.h header and MS Visual Studio
...
Update: Visual Studio 2010 and Visual C++ 2010 Express both have stdint.h. It can be found in C:\Program Files\Microsoft Visual Studio 10.0\VC\include
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im...
How do negative margins in CSS work and why is (margin-top:-5 != margin-bottom:5)?
...: 0;
top: 50%;
border-top: dashed 1px #ccc;
}
.child {
width: 200px;
height: 200px;
background: rgba(200, 198, 133, .5);
}
ul {
padding: 5% 20px;
}
.set1 .child {
margin: 0;
position: relative;
}
.set2 .child {
margin-left: 75px;
position: relative;
}
...
What is the difference between const_iterator and non-const iterator in the C++ STL?
...he values that they point to, regular iterators do.
As with all things in C++, always prefer const, unless there's a good reason to use regular iterators (i.e. you want to use the fact that they're not const to change the pointed-to value).
...