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How do you cast a List of supertypes to a List of subtypes?
...er to another. However, you can cast through an intermediate wildcard type and it will be allowed (since you can cast to and from wildcard types, just with an unchecked warning):
List<TestB> variable = (List<TestB>)(List<?>) collectionOfListA;
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How to convert std::string to lower case?
...tion tolower() , however in the past I have had issues with this function and it is hardly ideal anyway as use with a std::string would require iterating over each character.
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git: switch branch without detaching head
I have a repository on github with a main branch (master) and a branch for some experimental work. I made some commits and pushed to the experimental branch and everything was fine.
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How to execute file I'm editing in Vi(m)
How to execute file that I'm editing in Vi(m) and get output in split window (like in SciTE)?
13 Answers
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How to overcome TypeError: unhashable type: 'list'
...e split the file on `x`, since the part before the x will be
# the key and the part after the value
line = line.split('x')
# Take the line parts and strip out the spaces, assigning them to the variables
# Once you get a bit more comfortable, this works as well:
# key, value = [x....
How do I install a module globally using npm?
I recently installed Node.js and npm module on OSX and have a problem with the settings I think:
7 Answers
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Do you need to close meta and link tags in HTML?
I was just reading somebody's HTML who never closed meta and link tags in the HTML head section. The code worked fine; is closing these tags optional?
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Can the C# interactive window interact with my code?
In Visual Studio 2015 or later, I can open the 'C# interactive window', and run code:
5 Answers
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How do you change Background for a Button MouseOver in WPF?
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@C-F the reason for this is the standard Button style has triggers inside ControlTemplate, so they override OP's Style triggers.
– torvin
Sep 22 '15 at 2:01
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How do I REALLY reset the Visual Studio window layout?
I had a plugin installed in Visual Studio 2008, and it created some extra dockable windows. I have uninstalled it, and I can't get rid of the windows it created - I close them, but they always come back. They're just empty windows now, since the plugin is no longer present, but nothing I've tried ...