I know I am overlooking something obvious. I wrote this tiny program to learn what modules are installed on my machine: 

use strict;

use ExtUtils::Installed;

my $module;
my $inst = ExtUtils::Installed->new();
my (@modules) = $inst->modules();
    foreach $module (@modules) {
        print "$module \n";
}

[download]
When I run it, all I get back is the word Perl. Anyone want to stop laughing long enough to tell me the mistake I am making?

xenchu

Update:Well, actually I was expecting to see the Perl source distribution modules. According to the perldoc ExtUtils::Installed it is supposed to print all the modules on my system. I will try another way and if it works I will put it here. Thanks to both of you.

Update2:OK, here is the code I came up with: 

use strict;

use File::Find;
           my @files;
 
           find sub { push @files, $File::Find::name if -f _ && /\.pm$
+/ },
                @INC;

my ($mod, $hash, $name);
my (@results, %hash, @results2);  
@results = map {/.+\/.+\/(.*).pm$/} @files;

$hash{$_}++ foreach (@results);
foreach (sort keys %hash) {
    print "$_.pm \n";
}

[download]
I am sure that there is a better way to do this. And btw, I have only the standard modules on this machine, a condition I plan to rectify. Anyway, thanks again.



****sigfilesigfilesigfilesigfilesigfilesigfilesigfilesigfile

Perl has one Great Advantage and one Great Disadvantage:

It is very easy to write a complex and powerful program in three lines of code.

********************************************

The Needs of the World and my Talents run parallel to infinity.

In reply to Installed Modules by xenchu

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.