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Change R default library path using .libPaths in Rprofile.site fails to work
...l variables (in bash you can edit .bash_profile and/or .bashrc). See here: unix.stackexchange.com/questions/117467/… For setting these for current session only type in console export R_LIBS_USER='directory_of_your_choice'
– Paweł Rumian
Apr 9 '15 at 10:43
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What exactly is Python multiprocessing Module's .join() Method Doing?
...y of join() is that it's the opposite of fork, which is the common term in Unix-family operating systems for creating child processes. A single process "forks" into several, then "joins" back into one.
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Does Python have a package/module management system?
...asy_install, but easy_install is likely to be installed by default on most unixes, pip is not.
– Jeffrey Harris
Mar 13 '10 at 1:30
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How to undo the effect of “set -e” which makes bash exit immediately if any command fails?
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Sadly, the Unix shell language (most of which is not specific to 'bash') is one of the least internally consistent programming languages still in wide use today. You're going to have to learn lots more of these little warts. And I'd ...
How to generate a Dockerfile from an image?
...ge from your example? /usr/lib/ruby/gems/2.2.0/gems/excon-0.45.4/lib/excon/unix_socket.rb:14:in `connect_nonblock': Connection refused - connect(2) for /var/run/docker.sock (Errno::ECONNREFUSED) (Excon::Errors::SocketError)
– long
May 18 '16 at 15:52
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Why does Java allow us to compile a class with a name different than the file name?
... The combination of Emacs (or Vim, pick your poison) and the Unix shell utilities are perhaps not as everything-at-your-fingertips as a modern IDE, and they're certainly harder to learn, but they have two overwhelming advantages compared to every IDE I've ever tried: they never crash, ...
Calling C/C++ from Python?
...int fact(int n);
%}
extern int fact(int n);
Building a Python module on Unix:
swig -python example.i
gcc -fPIC -c example.c example_wrap.c -I/usr/local/include/python2.7
gcc -shared example.o example_wrap.o -o _example.so
Usage:
>>> import example
>>> example.fact(5)
120
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Easy way to pull latest of all git submodules
... implement the script as it is very capable in these areas. If you are on unix/linux, then I suggest just a bash script.
Need any clarifications? Just post a comment.
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How to run Maven from another directory (without cd to project dir)?
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I don't think maven supports this. If you're on Unix, and don't want to leave your current directory, you could use a small shell script, a shell function, or just a sub-shell:
user@host ~/project$ (cd ~/some/location; mvn install)
[ ... mvn build ... ]
user@host ~/projec...
Fetch frame count with ffmpeg
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In Unix, this works like charm:
ffmpeg -i 00000.avi -vcodec copy -acodec copy -f null /dev/null 2>&1 | grep 'frame=' | cut -f 2 -d ' '
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