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How to store a command in a variable in a shell script?
...o check and confirm this, you cand do:
echo test;
X=$(for ((c=0; c<=5; c++)); do
sleep 2;
done);
echo note the 5 seconds elapsed
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List changes unexpectedly after assignment. How do I clone or copy it to prevent this?
...e it:
new_list = old_list[:]
Alex Martelli's opinion (at least back in 2007) about this is, that it is a weird syntax and it does not make sense to use it ever. ;) (In his opinion, the next one is more readable).
You can use the built in list() function:
new_list = list(old_list)
You can use g...
When should I use OWIN Katana?
...xception occours (on a web application), you'll just get a blank page with 200 OK response. No error anywhere apart from the Windows Event log.
– simbolo
Jul 14 '14 at 0:08
7
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Visual Studio: How do I show all classes inherited from a base class?
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Visual Studio 6 had it on C++ projects nearly 20 years ago. The object browser and class diagram don't provide the same light weight ability to flip inheritance trees. I recently found that Eclipse has a great version of this, with Java at least. Co...
Copy a file in a sane, safe and efficient way
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With C++17 the standard way to copy a file will be including the <filesystem> header and using:
bool copy_file( const std::filesystem::path& from,
const std::filesystem::path& to);
bool copy_file( c...
What does {0} mean when initializing an object?
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Not quite.. In C++, if the first member cannot be zero-constructed then {0} will not work. Ex: struct A { B b; int i; char c; }; struct B { B(); B(string); }; A a = {}; // this statement cannot be rewritten as 'A a = {0}'.
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Factory pattern in C#: How to ensure an object instance can only be created by a factory class?
...r directly? The first natural desire to use a good old "friend" keyword of C++ will fall short with C#. So we need other options...
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Array versus List: When to use which?
...d with performance, and by that I mean, "Why are you using .Net instead of C++?" you should stick with List<>. It's easier to maintain and does all the dirty work of resizing an array behind the scenes for you. (If necessary, List<> is pretty smart about choosing array sizes so it doesn'...
List of MSBuild built-in variables
...be defined by 3rd-party tools so to get the complete list I just use (in a C++ project for example): Properties -> Configuration Properties -> General -> then on the Output or Intermediate Directory drop down choose Edit... and you should see a list of all defined properties.
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How Python web frameworks, WSGI and CGI fit together
...rt_response):
"""Simplest possible application object"""
status = '200 OK'
response_headers = [('Content-type','text/plain')]
start_response(status, response_headers)
return ['Hello world!\n']
That is a complete (if limited) WSGI application. A web server with WSGI support (suc...