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std::wstring VS std::string
...y:
On Linux, a wchar_t is 4 bytes, while on Windows, it's 2 bytes.
What about Unicode, then?
The problem is that neither char nor wchar_t is directly tied to unicode.
On Linux?
Let's take a Linux OS: My Ubuntu system is already unicode aware. When I work with a char string, it is natively encode...
Does the C++ standard mandate poor performance for iostreams, or am I just dealing with a poor imple
...
I'm rather disappointed in the Visual Studio users out there, who rather had a gimme on this one:
In the Visual Studio implementation of ostream, the sentry object (which is required by the standard) enters a critical section protecting the streambuf (which is not required)...
boost::flat_map and its performance compared to map and unordered_map
...ry locality improves performance a lot due to cache hits. I recently found out about boost::flat_map which is a vector based implementation of a map. It doesn't seem to be nearly as popular as your typical map / unordered_map so I haven't been able to find any performance comparisons. How does i...
Why does C++ not have reflection?
...data?
Which leads us to another big point:
C++ makes very few guarantees
about the compiled code. The
compiler is allowed to do pretty
much anything it likes, as long as
the resulting functionality is what
is expected. For example, your
classes aren't required to actually
be there. The compiler can ...
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
...cnt.
Cannon Lake (and Ice Lake) fixed this for popcnt.
bsf/bsr have a true output dependency: output unmodified for input=0. (But no way to take advantage of that with intrinsics - only AMD documents it and compilers don't expose it.)
(Yes, these instructions all run on the same execution unit).
...
How do you rotate a two dimensional array?
...
Sure, but what about a solution using O(1) memory?
– AlexeyMK
Sep 7 '08 at 17:51
22
...
Auto Scale TextView Text to Fit within Bounds
...upporting this feature for Android 4.0 (API level 14) and higher.
Check it out at: Autosizing TextViews
With Android 8.0 (API level 26) and higher:
<?xml version="1.0" encoding="utf-8"?>
<TextView
android:layout_width="match_parent"
android:layout_height="200dp"
android:autoS...
What does 'super' do in Python?
... methods.
However, it's almost impossible to use multiple-inheritance without super(). This includes common idioms like mixins, interfaces, abstract classes, etc. This extends to code that later extends yours. If somebody later wanted to write a class that extended Child and a mixin, their code wou...
How using try catch for exception handling is best practice
... ...
}
catch(Exception ex)
{
throw ex;
}
Having a try finally without a catch is perfectly valid:
try
{
listView1.BeginUpdate();
// If an exception occurs in the following code, then the finally will be executed
// and the exception will be thrown
...
}
finally
{
// I ...
Do asynchronous operations in ASP.NET MVC use a thread from ThreadPool on .NET 4
I have too many misunderstandings in my mind about asynchronous operations on ASP.NET MVC.
6 Answers
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