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How can I match and sum records from a file using Perl?

I have a text file in the following format:

211B1 CUSTOMER|UPDATE|  
211B2 CUSTOMER|UPDATE|  
211B3 CUSTOMER|UPDATE|  
211B4 CUSTOMER|UPDATE|  
211B5 CUSTOMER|UPDATE|  
567FR CUSTOMER|DELETE|  
647GI CUSTOMER|DELETE|

I want the script to process a text file and report the following:

  • "UPDATE" for CUSTOMER column found for Acct's: 211B1,211B2,211B3,211B4,211B5
  • "DELETE" for CUSTOMER column found for Acct's: 5675FR, 6470GI

I can script simple solutions, but it seems a bit tricky to me, and I would appreciate help or guidance.

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5 answers


collate.pl

#!/usr/bin/perl

use strict;

my %actions;
while (<>) {
    my ($key, $fld, $action) = /^(\w+) (.+?)\|(.+?)\|/ or die "Failed on line $.!";
    push @{$actions{$action}{$fld}}, $key;
}

foreach my $action (keys %actions) {
    foreach my $fld (keys %{$actions{$action}}) {
        print "\"$action\" for column $fld found for Acct's: " . join(",", @{$actions{$action}{$fld}}), "\n";
    }
}


Use like this:

perl collate.pl < input.txt > output.txt
+6


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With awk:

echo '211B1 CUSTOMER|UPDATE|  
211B2 CUSTOMER|UPDATE|  
211B3 CUSTOMER|UPDATE|  
211B4 CUSTOMER|UPDATE|  
211B5 CUSTOMER|UPDATE|  
567FR CUSTOMER|DELETE|  
647GI CUSTOMER|DELETE|' | awk -F '[ |]' '
    BEGIN {
        upd="";del=""
    } {
      if ($3 == "UPDATE") {upd = upd" "$1};
      if ($3 == "DELETE") {del = del" "$1};
    } END {
        print "Updates:"upd; print "Deletes:"del
    }'

gives:

Updates: 211B1 211B2 211B3 211B4 211B5
Deletes: 567FR 647GI


Basically it just splits each line into three fields (with an option -F

) and maintains a list of updates and deletions that it joins to, depending on the "command".

BEGIN

and END

run before and after all string processing, so they get initialized and final output.

I would put it in a script to make it easier. I left it as a command line tool since I usually debug my awk scripts.

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#!/usr/bin/perl

use strict;
use warnings;

my %data;

while ( my $line = <DATA> ) {
    next unless $line =~ /\S/;
    my ($acct, $col, $action) = split /\s|\|/, $line;
    push @{ $data{$action}->{$col} }, $acct;
}

for my $action ( keys %data ) {
    for my $col ( keys %{ $data{$action} } ) {
        print qq{"$action" for column $col found for acct's: },
              join q{,}, @{ $data{$action}->{$col} }, "\n";    
    }

}
__DATA__
211B1 CUSTOMER|UPDATE|  
211B2 CUSTOMER|UPDATE|  
211B3 CUSTOMER|UPDATE|  
211B4 CUSTOMER|UPDATE|  
211B5 CUSTOMER|UPDATE|  
567FR CUSTOMER|DELETE|  
647GI CUSTOMER|DELETE|
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another awk version, although it reverses the order of the code values, and has an extra "," at the end of each line


BEGIN { FS="[ |]" }

{
        key = $3 " for column " $2
        MAP[ key ] = $1 "," MAP[ key ]
}

END {
        for ( item in MAP ) {
                print item " found for Acct's: " MAP[ item ]
        }
}
0


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Based on your question, you can do this:

perl -i.bak -pe'if(/^211B[1-5]/){s/CUSTOMER/UPDATE/}elsif(/^(5675FR|6470GI)/){s/CUSTOMER/DELETE/}' filename

Although now I notice that the last two account numbers are different in this example, and also that the second column already has these values ​​...

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