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Calculating percentage of change between columns

by naChoZ (Curate)
on May 29, 2013 at 22:47 UTC ( #1035927=perlquestion: print w/replies, xml ) Need Help??

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  1. or download this
    num|name
    1|foo
    ...
    27|quux
    37|quuux
    48|quuuux
    
  2. or download this
    file1:
    acct|description|nums
    ...
    foo-004|foo four|12,18,25,37
    foo-005|foo five|12,15,25,27,37
    foo-006|foo six|1,12,15,25,27,37,99
    
  3. or download this
    $hash => {
        file1 => {
    ...
                    quuuux => 0,
                 },
    }
    
  4. or download this
    name    file1   file2   file3
    foo     4       4       4
    ...
    quux    8       8       8
    quuux   6       5       5
    quuuux  empty   empty   empty
    
  5. or download this
    name    file1   file2   %change  file3   %change
    foo     4       4       0%       4       0%
    ...
    quux    8       8       0%       8       0%
    quuux   6       5       -83%     5       0%
    quuuux  empty   empty            empty
    
  6. or download this
    my $hash = {};
    my @heading = ( 'name' );
    ...
    
    push @heading, basename($_) for sort @filenames;
    

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Node Type: perlquestion [id://1035927]
Approved by marto
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[Corion]: In the same vein I have a script that automates Firefox to enter some data into another system. It's not faster than the people using the script if they were to do it manually, but they prefer not having to check the data and not having typos when ...
[Corion]: ... entering the data
[Corion]: Discipulus: I don't know whether I could really do that, but the init process itself mostly launches other processes, and the whole startup is just following a path of dependencies and making sure they are all running. Which basically is what ...
[Discipulus]: when at work my time is (temporarly) owned by the firm, so i do not care (coworkers whatch movies.. I code Perl)
[Corion]: ... make already does, except for files instead of programs. But maybe with some /proc hackery, that could be eliminated and one could use plain make :-D
[choroba]: systemd just makes is asynchronous
[choroba]: so, make -j
[Corion]: Discipulus: Yeah - but when writing Perl to save time (instead of having fun), it helps to look whether you're actually saving time ;) Why spend 5 minutes doing manually what you can spend three years automating? ;)
[Corion]: choroba: Oh, yeah :-D

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