Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?
 
PerlMonks  

comment on

( [id://3333] : superdoc . print w/replies, xml ) Need Help??

If I wanted to produce the following result

Header stuff 123456|987|12 Apples|9 Oranges|19 Bananas|4 Footer junk Header stuff 123456|987|34 Apples|7 Oranges|15 Bananas|11 Footer junk Header stuff 123456|987|56 Apples|3 Oranges|9 Bananas|8 Footer junk

from the two input files fake1.dat

Header stuff 123456|987|12 Apples|4 Oranges|12 Bananas|3 Footer junk Header stuff 123456|987|34 Apples|5 Oranges|7 Bananas|8 Footer junk Header stuff 123456|987|56 Apples|2 Oranges|1 Bananas|3 Footer junk

and fake2.dat

Header stuff 123456|987|12 Apples|5 Oranges|7 Bananas|1 Footer junk Header stuff 123456|987|34 Apples|2 Oranges|8 Bananas|3 Footer junk Header stuff 123456|987|56 Apples|1 Oranges|8 Bananas|5 Footer junk

I would probably write a script like this to do it:

#!/usr/bin/perl -w use strict; my %data; { # Go looking for files that match this pattern. foreach my $thisFile (glob("fake?.dat")) { # Open the file, and die if that doesn't work. open ( INPUT, $thisFile ) or die "Unable to open $thisFile: $!"; my ( $header, $id, @data, $footer ); while (<INPUT>) { # Read in a line from the file. We're expecting # a header, an ID line, followed by a bunch of # lines of data, terminated by a footer. There # can be several of these records in a file. For # the sake of simplicity, we assume that the # lines of data are always present and always in # the same order. chomp; if ( defined ( $header ) ) { if ( defined ( $id ) ) { if ( /Footer/ ) { # If we just saw a footer, that's the end # of a record and we can process what we # have now. $footer = $_; # The unique ID number is the last number # on the ID line. my ( $id3 ) = $id =~ m/\|(\d+)$/; # Store this record's information into a # hash, either re-using the existing hash # element, or creating a new one. if ( exists($data{ $id3 }) ) { my @updatedData; foreach ( @{$data{ $id3 }->{data}} ) { my @dataSoFar = split(/\|/, $_); my @thisData = split(/\|/,shift @data); $dataSoFar[1] += $thisData[1]; push ( @updatedData, join('|', @dataSoFar) ); } $data{ $id3 }->{data} = \@updatedData; } else { $data{ $id3 }->{header} = $header; $data{ $id3 }->{id} = $id; push ( @{$data{ $id3 }->{data}}, @data ); $data{ $id3 }->{footer} = $footer; } # Clear variables for next loop around the # input file. undef $header; undef $id; @data = (); undef $footer; } else { push ( @data, $_ ); } } else { $id = $_; } } else { $header = $_; } } close ( INPUT ); } # Having added up the various lines of data, we now # dump out a summary. foreach my $thisKey ( sort keys %data ) { print "$data{ $thisKey }->{'header'}\n"; print "$data{ $thisKey }->{'id'}\n"; foreach ( @{$data{ $thisKey }->{'data'}} ) { print "$_\n"; } print "$data{ $thisKey }->{'footer'}\n"; } }

See if that helps you.

Alex / talexb / Toronto

"Groklaw is the open-source mentality applied to legal research" ~ Linus Torvalds


In reply to Re: Adding object identifiers corresponding to matched headers and sub-headers. by talexb
in thread Adding object identifiers corresponding to matched headers and sub-headers. by Kiran Kumar K V N

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.