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Re^2: Perl Sorting Help

by zee3b (Novice)
on Feb 12, 2013 at 21:19 UTC ( #1018449=note: print w/ replies, xml ) Need Help??


in reply to Re: Perl Sorting Help
in thread needed help

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.


Comment on Re^2: Perl Sorting Help
Re^3: Perl Sorting Help
by frozenwithjoy (Curate) on Feb 12, 2013 at 21:28 UTC
    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.
Re^3: Perl Sorting Help
by frozenwithjoy (Curate) on Feb 12, 2013 at 23:06 UTC
    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 $last_term"; } # If a line ends with '}', that means we are moving up a level, so + you # remove the last element of the array '@current_command'. pop @current_command if /}$/; }
      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.

      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.

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