Re: How can i debug compound map/grep statements just using print?

[Kenosis]

Did you mean:

$amount = $amount * 24 * 60 * 60;

And have you tried:

$result =
  grep { /.+\.$suffix$/ and $time - ( $_->stat )[9] >= $amount }
  io($dir)->all;

$result is the file count...

[karlgoethebier]

No.

Karls-Mac-mini:~ karl $ perl -e 'print 2*60*60;'
7200

perl -e 'print scalar( grep { $_ == 1 } (0,0,0) );' # nothing found
0

perl -e 'print scalar( grep { $_ == 1 } (1,0,0) );' # one found
1

[Kenosis]

You have the following:

=item B<-a, --amount>

Search for files older than <amount> days, mandatory.

In two days, there are 2 * 24 * 60 * 60 or 172800 seconds, thus it seemed that the following was needed:

$amount = $amount * 24 * 60 * 60;

since one day equals 24 * 60 * 60 or 86400 seconds. Additionally, the following worked when I ran it using the above formula for $amount:

$result =
  grep { /.+\.$suffix$/ and $time - ( $_->stat )[9] >= $amount }
  io($dir)->all;

An equivalent search can be done using File::Find::Rule:

$result = File::Find::Rule->file()
                          ->maxdepth(1)
                          ->name(qr/.+\.$suffix$/i)
                          ->mtime(">= $amount")
                          ->in($dir);

And the following, too, but grepping on days old instead of using mtime:

$result = grep { -M >= $amount / 86400 } # Convert back to days
          File::Find::Rule->file()
                          ->maxdepth(1)
                          ->name(qr/.+\.$suffix$/i)
                          ->in($dir);

All three methods produced the same result, even when an equivalent constant was used for the days in the last grep.

After adjusting the $amount formula, your original code produced the same result, too:

    $result =
      grep { $_ == 1 }
      map  { $time - $_ >= $amount }
      map  { ( $_->stat )[9] }  # e.g i'm interested in this...
      grep { $_->name =~ /.+\.$suffix$/ } # ...and this
      io($dir)->all;

Thus, all four code snippets produced identical results.

[karlgoethebier]

Sorry about that awkward typo: should have been hours...

[karlgoethebier]

"An equivalent search can be done using File::Find::Rule"

This is simply true, but what i wanted to do was this:

• Not using File::Find
• Not using File::Find::Rule"
• Not using qx(find...[options])
• Bothering myself with map/grep

Thank you very much for your advice and the insights you gave to me. Regards, Karl