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How to use pip with Python 3.x alongside Python 2.x
...also using [ pip2 | pip2.7 | pip3 | pip3.4 ]. Is this a change in pip or different between different systems?
– Jon Surrell
Feb 18 '15 at 11:12
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How do I use the new computeIfAbsent function?
I very much want to use Map.computeIfAbsent but it has been too long since lambdas in undergrad.
4 Answers
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What is the gain from declaring a method as static
...c, you can't access non-static members; hence, your scope is narrower. So, if you don't need and will never need (even in subclasses) non-static members to fulfill your contract, why give access to these fields to your method? Declaring the method static in this case will let the compiler check that...
Resolving ambiguous overload on function pointer and std::function for a lambda using +
...ked up by an argument by Daniel Krügler, this unary + trick should be specified behaviour, i.e. you can rely on it (see discussion in the comments).
Still, I'd recommend using an explicit cast to the function pointer type if you want to avoid the ambiguity: you don't need to ask on SO what is does...
Check if current directory is a Git repository
...rg.uk/).
# Distributed under the GNU General Public License, version 2.0.
if [ -d .git ]; then
echo .git;
else
git rev-parse --git-dir 2> /dev/null;
fi;
You could either wrap that in a function or use it in a script.
Condensed into a one line condition suitable for bash and zsh
[ -d .git...
How do I find all installed packages that depend on a given package in NPM?
...docs.npmjs.com/cli/ls
For example, to see which packages depend on contextify you can run:
npm ls contextify
app-name@0.0.1 /home/zorbash/some-project
└─┬ d3@3.3.6
└─┬ jsdom@0.5.7
└── contextify@0.1.15
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Unpivot with column name
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@bluefeet Is there a way such that you don't need to specify the names (Maths, Science, English)? I am doing this operation to many tables, all with the same structure but with different column names.
– LBogaardt
Feb 8 '17 at 9:23
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Running multiple TeamCity Agents on the same computer?
...machine. They function as separate agents and TeamCity works with them as different agents, not utilizing the fact that they share the same machine.
After installing one agent you can install additional one, providing the following conditions are met:
the agents are installed in the separate direc...
Can an Option in a Select tag carry multiple values?
...ars after answering) to put both values into JSON format (using JSON.stringify()) because of a complaint that my proof-of-concept answer "could confuse a newbie developer."
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Difference between .success() and .complete()?
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.success() only gets called if your webserver responds with a 200 OK HTTP header - basically when everything is fine.
However, .complete() will always get called no matter if the ajax call was successful or not - maybe it outputted errors and returned ...