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Why doesn't 'ref' and 'out' support polymorphism?
...ny variable, not only out parameter variable. And also the reader needs to cast the argument value to Mammal before he attempts to access it as Mammal and of course it can fail if he is not considerate
– astef
Jun 20 '18 at 20:46
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Why doesn't c++ have &&= or ||= for booleans?
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The only way to get an invalid value into a bool is by using reinterpret_cast on pointers:
int i = 2;
bool b = *reinterpret_cast<bool*>(&i);
b |= true; // MAY yield 3 (but doesn’t on my PC!)
But since this code results in undefined behaviour anyway, we may safely ignore this potenti...
Clear terminal in Python [duplicate]
Does any standard "comes with batteries" method exist to clear the terminal screen from a Python script, or do I have to go curses (the libraries, not the words)?
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A non well formed numeric value encountered
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Casting won't fix the issue since PHP will automatically cast it when passed to the method.
– JohnP
May 26 '11 at 9:36
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Convert interface{} to int
I'm trying to get a value from a JSON and cast it to int but it doesn't work, and I don't know how to do it properly.
10 An...
How do you normalize a file path in Bash?
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if you're wanting to chomp part of a filename from the path, "dirname" and "basename" are your friends, and "realpath" is handy too.
dirname /foo/bar/baz
# /foo/bar
basename /foo/bar/baz
# baz
dirname $( dirname /foo/bar/baz )
# /foo
realpath ../foo
# ../foo: No such file or directory
re...
What is move semantics?
I just finished listening to the Software Engineering radio podcast interview with Scott Meyers regarding C++0x . Most of the new features made sense to me, and I am actually excited about C++0x now, with the exception of one. I still don't get move semantics ... What is it exactly?
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Difference between \n and \r?
What’s the difference between \n (newline) and \r (carriage return)?
10 Answers
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Could not load file or assembly Microsoft.SqlServer.management.sdk.sfc version 11.0.0.0
I have installed MS SQL Server 2008 R2 and when I try to update model from database under EDMX file I am facing that error.
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Where is virtualenvwrapper.sh after pip install?
I'm trying to setup virtualenvwrapper on OSX, and all the instructions and tutorials I've found tell me to add a source command to .profile, pointing towards virtualenvwrapper.sh. I've checked all the python and site-packages directories, and I can't find any virtualenvwrapper.sh. Is this something ...