Hey eminempark,

As GrandFather said in the first reply of this thread, you haven't shown any code or even a description of what you've tried. I made the quick change you're looking for, but am hoping to see you run the ball the rest of the way into the endzone from here:

use autodie;
my (%used, %player);
open $player{$_}, '<', "$_.txt" for qw( DR DL DC SW );
open my $formation, '<', 'formation.txt';
for my $position (<$formation>) {
        chomp $position;
        while (readline $player{$position}) {
                my ($name) = split;
                next if $used{$name};
                $used{$name} = 1;
                last;
        }
        print $position, ' ',  $_ // "No Player\n";
}

[download]

In reply to Re^5: Football formation by Loops
in thread Football formation by eminempark

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.