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How do I check the operating system in Python?
... know on which platform you are on out of "Linux", "Windows", or "Darwin" (Mac), without more precision, you should use:
>>> import platform
>>> platform.system()
'Linux' # or 'Windows'/'Darwin'
The platform.system function uses uname internally.
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Performance of Java matrix math libraries? [closed]
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I guess you were using a multicore machine, so these results are strongly affected by whether the library uses multicore or not? For some purposes, eg when one is parallelizing using mpi or hadoop etc, the important time is actually the singlecore time, since...
How does one make an optional closure in swift?
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@Cezar Not on a mac at the moment so my syntax may be slightly off, but remember the ? is really just sugar for Optional<T>, so you could also write ` func then(onFulfilled: ()->(), onReject: Optional<()->()>) { ` then ...
How to extract a string using JavaScript Regex?
...d to return an array with the
matches. In my browser it doesn't (Safari on Mac returns only the full
match, not the groups), but
Regexp.exec(string) works.
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Using the scrollwheel in GNU screen
... the following worked for me:
http://slaptijack.com/system-administration/mac-os-x-terminal-and-gnu-screen-scrollback/
Briefly, it involves adding the following to ~/.screenrc on the remote host (the one you're running screen on):
defscrollback 5000
termcapinfo xterm* ti@:te@
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Objective-C class -> string like: [NSArray className] -> @“NSArray”
...e is a method added by the scripting extensions which is only available on Mac OS X, even then it is finicky in how it works because it is not fully documented (or at least it wasn't the last time I checked). NSStringFromClass() is the correct way to go about it.
– dreamlax
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Access denied for user 'root'@'localhost' while attempting to grant privileges. How do I grant privi
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thanx.. in mac OS with mysql installed through homebrew run the following command cd /usr/local/Cellar/mysql/5.5.25a/bin && mysql_upgrade
– zoras
Aug 7 '12 at 5:42
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How to generate a core dump in Linux on a segmentation fault?
...For more details, please check: Where do I find the core dump in Ubuntu?.
macOS
For macOS, see: How to generate core dumps in Mac OS X?
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What is the difference between instanceof and Class.isAssignableFrom(…)?
...wever, the actual performance is NOT determined by the bytecode but by the machine code (which is platform dependent). Let's do a micro benchmark for each of the operators.
The benchmark
Credit: As advised by @aleksandr-dubinsky, and thanks to @yura for providing the base code, here is a JMH bench...
How to count total lines changed by a specific author in a Git repository?
...s removed lines: %s total lines: %s\n", add, subs, loc }' -
Using Awk on Mac OSX:
git log --author="_Your_Name_Here_" --pretty=tformat: --numstat | awk '{ add += $1; subs += $2; loc += $1 - $2 } END { printf "added lines: %s, removed lines: %s, total lines: %s\n", add, subs, loc }' -
EDIT (2017...