What is this use case here? Something beyond homework?

my %min_data;

for my $line (@lines)
{
   my @columns = split ' ', $line;
   unless (exists $min_data{$columns[1]})
   {
      $min_data{ $columns[1] } = {min=>$columns[0],lines=>[$line]};
   }
   elsif ($columns[0] == $min_data{ $columns[1] }->{min})
   {
      push @{ $min_data{ $columns[1] }->{lines} }, $line;
   }
   elsif ($columns[0] < $min_data{ $columns[1] }->{min})
   {
      $min_data{ $columns[1] }->{lines} = [$line];
      $min_data{ $columns[1] }->{min} = $columns[0];
   }
}

for my $column_two (sort keys %min_data)
{
   say for @{ $min_data{$column_two}->{lines} };
}

[download]

onelesd's solution is far more simple

In reply to Re: Selective Printing of Lines by Kc12349
in thread Selective Printing of Lines by polsum

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.