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What are the differences between poll and select?

...t poll() not being available on BSD still apply? MacOS X (which is partly based on BSD) has poll(), and the POSIX standard (POSIX 2008) requires it. – Jonathan Leffler Mar 10 '10 at 20:49 ...
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How to access pandas groupby dataframe by key

... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers. Draft saved Draft discarded ...
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iTerm 2: How to set keyboard shortcuts to jump to beginning/end of line?

... profile to do this? Then I created GabLeRoux/iterm2-macos-dynamic-profile based on these instructions. It works flawlessly, thanks ???? – GabLeRoux Aug 1 '18 at 19:07 ...
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Declaring variables inside or outside of a loop

...performance requirements instead of having to go all over your entire code base and tweak and hack things in order to squeeze clock cycles here and there. share | improve this answer | ...
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Is 'switch' faster than 'if'?

...r [rsp+30h],4 13FE81C6F je testSwitch+0AFh (13FE81CAFh) A jump table based solution does not use comparison at all. Either not enough branches to cause the compiler to generate a jump table, or your compiler simply doesn't generate them. I'm not sure which. EDIT 2014: There has been some dis...
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MAC addresses in JavaScript

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How to safely open/close files in python 2.4

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How should the ViewModel close the form?

...: protected override void OnStartup(StartupEventArgs e) { base.OnStartup(e); MainWindow window = new MainWindow(); var viewModel = new MainWindowViewModel(); viewModel.RequestClose += window.Close; window.DataContext = viewModel; window.Show...
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Measure time in Linux - time vs clock vs getrusage vs clock_gettime vs gettimeofday vs timespec_get?

... issue in practice. Portability is questionable. I wrote a hybrid function based on this snippet that uses clock_gettime when compiled on Linux, or a Mach timer when compiled on OS X, in order to get ns precision on both Linux and OS X. All of the above exist in both Linux and OS X except where ot...
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Difference between DateTime and Time in Ruby

... to handle larger values without producing errors. DateTime is a calendar-based approach where the year, month, day, hour, minute and second are stored individually. This is a Ruby on Rails construct that serves as a wrapper around SQL-standard DATETIME fields. These contain arbitrary dates and can...