Re: Perl Sorting Help

[frozenwithjoy]

in reply to needed help

As toolic said, you should use a module for this if there is one available. However, if not, I threw this together. It works for this set, but you may need to customize it depending on how (ir)regular your input is:

#!/usr/bin/env perl
use strict;
use warnings;
use feature 'say';

say "Code:";
my @current_command;
while (<DATA>) {
    chomp;
    push @current_command, $1 if /^\s*(.+)\s{$/;
    if (/^\s*(.+);$/) {
        my $last_term = $1;
        say "set @current_command $last_term";
    }
    pop @current_command if /}$/;
}

__DATA__
deviceconfig {
  system {
    snmp-setting {
      snmp-system {
        location "VA";
        contact US;
        send-event-specific-traps yes;
      }
      access-setting {
        version {
          ll1 {
            snmp-community-string trap;
          }
        }
      }
    }

Output:

Code:
set deviceconfig system snmp-setting snmp-system location "VA"
set deviceconfig system snmp-setting snmp-system contact US
set deviceconfig system snmp-setting snmp-system send-event-specific-t
+raps yes
set deviceconfig system snmp-setting access-setting version ll1 snmp-c
+ommunity-string trap

[zee3b]

Thanks a lot for the reply. Now what if I was using a txt file as an input. Where would the fine name go. I'm sorry for asking such silly questions as I am a beginner and trying really hard to understand.

[frozenwithjoy]

Take a look at the first example in open. Once you open your file handle, replace <DATA> with <$your_filehandle> at the beginning of the loop.

[frozenwithjoy]

Hey zee3b, I figured I'd respond to your PM here so I'd have more room.

Hey, thanks a lot for the help. That really worked and was exactly what I was looking for. When you get a few mins, can you please explain how the code works for my understanding. Thanks!

# Read through file/data one line at a time.
while (<DATA>) {

    # Remove newline from end of line (actually not necessary for your
+ input).
    chomp;

    # If a line ends with '{', use a regular expression (REGEX) to cap
+ture
    # the relevant portion by having that portion surrounded by parent
+heses.
    # Push the captured string (contained within the variable '$1', si
+nce it
    # is the first captured string) onto the end of the array '@curren
+t command'.
    # This REGEX matches:
        # the beginning of the line: ^
        # 0 or more spaces: \s*
        # 1 or more of anything (captured because it is in parentheses
+): (.+)
        # 1 space followed by 1 {: \s{
        # the end of the line: $
    push @current_command, $1 if /^\s*(.+)\s{$/;

    # If a line ends with ';', use a REGEX to capture the relevant por
+tion,
    # then print out the contents of the array followed by the string 
+you
    # just captured and assigned to '$last_term'.
    if (/^\s*(.+);$/) {
        my $last_term = $1;
        say "set @current_command $last_term";
    }

    # If a line ends with '}', that means we are moving up a level, so
+ you
    # remove the last element of the array '@current_command'.
    pop @current_command if /}$/;
}

[Anonymous Monk]

Thanks a lot frozenwithjoy. That really cleared a lot of my confusions. It's the regular expressions I need to learn. 7stud, thanks for the advice. I bought the Learning Perl book and will definitely follow your advice, finish the book and move onto the intermediate level one.

[zee3b]

Thanks a lot frozenwithjoy. That really cleared a lot of my confusions. It's the regular expressions I need to learn.

7stud, thanks for the advice. I bought the Learning Perl book and will definitely follow your advice, finish the book and move onto the intermediate level one.