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USChristopher Bottoms
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  1. USChristopher Bottoms
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    copied!<p>I use Python, Perl 6, Perl, R, Java, bash, and anything else that is needed.</p> <p>Utilizo Python, Perl 6, Perl, R, Java, bash, o lo que sea necesario. </p> <p><a href="http://stackoverflow.com/a/28481250/215487">A good explanation of creating good reproducible R questions</a></p> <p><a href="http://stackoverflow.com/questions/15289995/how-to-get-help-in-r/15290370#15290370">How to get help in R</a></p> <hr> <h1>Comparison of Python 3 and Perl 6 (both very nice languages)</h1> <h2>Python 3: find common lines between two files, regardless of the order:</h2> <pre><code>#!/bin/env python import argparse parser = argparse.ArgumentParser(description='Determine the lines in common between two files') parser.add_argument('fileA', help='file name') parser.add_argument('fileB', help='file name') args = parser.parse_args() with open(args.fileA) as x: linesA = x.readlines() with open(args.fileB) as x: linesB = x.readlines() intersection = set(linesA).intersection(set(linesB)) print("".join(sorted(intersection))) </code></pre> <p>Usage message resulting from <code>python intersection_of_lines.py --help</code>:</p> <pre><code>usage: intersection_of_lines.py [-h] fileA fileB Determine the lines in common between two files positional arguments: fileA file name fileB file name optional arguments: -h, --help show this help message and exit </code></pre> <h2>Perl 6: find common lines between two files, regardless of the order:</h2> <pre><code>#!/bin/env perl6 sub MAIN #= Determine the lines in common between two files ( $fileA, #= file name $fileB, #= file name ) { my @linesA = $fileA.IO.lines; my @linesB = $fileB.IO.lines; my $intersection = @linesA ∩ @linesB; put $intersection.keys.sort.join("\n"); } </code></pre> <p>Yes that is <code>∩</code>, a real intersection symbol, thanks to Unicode support. You can also use <code>(&amp;)</code> for intersection, if your editor has issues with Unicode. </p> <p>You also get a nice usage message resulting from <code>perl6 intersection_of_lines.p6 --help</code>:</p> <pre><code>Usage: ./intersection_of_lines.p6 &lt;fileA&gt; &lt;fileB&gt; -- Determine the lines in common between two files &lt;fileA&gt; file name &lt;fileB&gt; file name </code></pre> <hr> <h1>Perl 6 tidbits</h1> <p>Perl 6 is a very clean, concise, understandable language. It is a new language (not just a different version of Perl). Its design pulls from the strengths of other languages. </p> <p><a href="http://blogs.perl.org/users/zoffix_znet/2016/01/perl-6-rotor-the-king-of-list-manipulation.html" rel="nofollow noreferrer">Perl 6's <code>rotor</code> (the "king of list manipulation")</a>.</p> <p><a href="http://www.0racle.info/articles/perl_6_on_rails" rel="nofollow noreferrer">Error handling example</a>.</p> <h2>SLURM</h2> <p>Passing environment variables to SLURM: <a href="https://stackoverflow.com/questions/45592730">Passing SLURM batch command line arguments to R</a></p> <p><code>sbatch --export=GREETING=Hello,PLACE=world --wrap='echo "$GREETING $PLACE" &gt; howdy.txt'</code></p>
 

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