I cannot reproduce your problem in 5.6.1. What doesn't compile about that latter statement? It looks fine logically and works fine on my system (taking liberty with the nature of your function and the data):

#!/usr/bin/perl

use Data::Dumper;

sub get_day_name {
        return "first"  if $_[0] =~ /one/;
        return "second" if $_[0] =~ /two/;
        return "third"  if $_[0] =~ /three/;
        return;
}

print Dumper {map {$_ => get_day_name($_)} <DATA>};

__DATA__
one
two
three

[download]
Results: 
$VAR1 = {
          'two
' => 'second',
          'three
' => 'third',
          'one
' => 'first'
        };

[download]

You probably want a chomp in your map though to get rid of those newlines.

In reply to Re: Printing a reference to the output of map by Fastolfe
in thread Printing a reference to the output of map by sierrathedog04

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.