http://qs321.pair.com?node_id=11108720


in reply to Parse variables from @output

Removed the quotation marks to fix second and third values for $VAR1. Just need to figure out the first result now, note the two leading spaces are intentional below, this is how it appears in the output 

#!/usr/local/bin/perl
##
use strict;
use warnings;
use Data::Dumper;
my @output = (
     qq/Hardware\n/
    .qq/   cisco Nexus 3048 Chassis ("48x1GE + 4x10G Supervisor)\n/
    .qq/   Intel(R) Celeron(R) CPU P450 with 3981680 kB of memory.\n/
    ,
     qq/Cisco CISCO2901\/K9 (revision 1.0) with 483328K\/40960K bytes 
+of memory.\n/
    ,
     qq/cisco WS-C3550-48 (PowerPC) processor (revision N0) with 65526
+K\/8192K bytes of memory.\n/
    .qq/Model number: WS-C3550-48-SMI\n/
);
print "@output\n";
foreach (@output) {
    my %details;
    if (/^Hardware/i) {
        $details{'Chassis'}     = $1 if (/^cisco Nexus (\S+)/i);
        $details{'Main Memory'} = $1 if (/^Intel (\S+)/i);
    }

    if (/^cisco ((Catalyst )?\S+) .* with (\S+) bytes of memory/i) {
        $details{'Chassis'}     = $1;
        $details{'Main Memory'} = $3;
    }

    $details{'Chassis'} = $1 if (/^Model number: (\S+)/i);
    print Dumper(\%details);
}

[download]

Result...

Hardware
   cisco Nexus 3048 Chassis ("48x1GE + 4x10G Supervisor)
   Intel(R) Celeron(R) CPU P450 with 3981680 kB of memory.
 Cisco CISCO2901/K9 (revision 1.0) with 483328K/40960K bytes of memory
+.
 cisco WS-C3550-48 (PowerPC) processor (revision N0) with 65526K/8192K
+ bytes of memory.
Model number: WS-C3550-48-SMI

$VAR1 = {};
$VAR1 = {
          'Main Memory' => '483328K/40960K',
          'Chassis' => 'CISCO2901/K9'
        };
$VAR1 = {
          'Main Memory' => '65526K/8192K',
          'Chassis' => 'WS-C3550-48'
        };

[download]

Replies are listed 'Best First'.
Re^2: Parse variables from @output
by Corion (Patriarch) on Nov 15, 2019 at 08:54 UTC

    You have:

       .qq/   cisco Nexus 3048 Chassis ("48x1GE + 4x10G Supervisor)\n/

    [download]

    but your match wants cisco to appear at the start of a line:

            $details{'Chassis'}     = $1 if (/^cisco Nexus (\S+)/i);

    [download]

    You will need to allow for some whitespace in front of cisco, for example by allowing for \s*:

            $details{'Chassis'}     = $1 if (/^\s*cisco Nexus (\S+)/i);

    [download]

    But "start of the line" (^) means "start of the whole string" to Perl unless you also tell it to match after a newline using the /m modifier:

            $details{'Chassis'}     = $1 if (/^\s*cisco Nexus (\S+)/mi);

    [download]

    Adding that, I get:

    $VAR1 = {
          'Chassis' => '3048'
        };
$VAR1 = {
          'Main Memory' => '483328K/40960K',
          'Chassis' => 'CISCO2901/K9'
        };
$VAR1 = {
          'Chassis' => 'WS-C3550-48',
          'Main Memory' => '65526K/8192K'
        };

    [download]
[reply]
[d/l]
[select]

      That's spot on thanks. Chassis variable working. Any idea on the memory part?

      $details{'Main Memory'} = $1 if (/^\s* Intel .* with (\S+) kB of memor
+y/mi);

      [download]
[reply]
[d/l]

        Maybe now is a good moment to look at your regular expression and compare it with the input string.

        For example, there is a space after "Intel" in your regular expression, but no such space in your input string.

[reply]
        Yeah that was the only issue. Learning curve this is. Top man cheers
[reply]

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