Hello Monks,

I have a file with a single column of words like this:

brain0001
lung0001
brain00002
kidney0003
brain00003

[download]

I need to put this words into a hash of arrays, separated by its category (brain, lung, kidney), so I wrote this code:

$data = "mydata.list";

@pref = ("brain", "lung", "kidney");

%dfs = map {$_ => ()} @pref;

open DF, "<$data";
while(my $line=<DF>){
    chomp($line);
    foreach $pat (@pref){
        push @{$dfs{$pat}},$line if ($line=~/$pat/);
    }
}
close DF;

[download]

This code actually works and populate the hash in the right way. However, I think the foreach loop can be replaced with a single line.

How can I do this?

In reply to populating a HoA with regexp by asqwerty

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.