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Step 1: get all your stock data into a hash as suggested by poj

use strict; use Data::Dumper; my %stock; while (<DATA>) { my ($qty,$model,$size) = split(',',$_); $stock{$model} = [0,0,0,0] unless (exists $stock{$model}); $stock{$model}[0] = $qty if ($size =~ /sm/i); $stock{$model}[1] = $qty if ($size =~ /md/i); $stock{$model}[2] = $qty if ($size =~ /lg/i); $stock{$model}[3] = $qty if ($size =~ /xl/i); } print Dumper(\%stock); __DATA__ 224,128,MD,B,840197082997 0,128,LG,B,840197083000 0,128,XL,B,840197083017 0,12,SM,B,840197082997 15,12,LG,B,840197083000 0,12,XL,B,840197083017 32,8,SM,B,840197082997

Step 2: Update file2 data

use strict; ## simulate stock data from above script my %stock; $stock{'128'} = [0,224,0,0]; $stock{'12'} = [0,0,15,0]; $stock{'8'} = [32,0,0,0]; while (<DATA>) { ## file2 my @data = split(',',$_); if (exists $stock{$data[0]}) { my $ary_ref = $stock{$data[0]}; my ($sm,$md,$lg,$xl) = @$ary_ref; $data[9] = $sm unless ($sm); $data[12] = $md unless ($md); $data[15] = $lg unless ($lg); $data[18] = $xl unless ($xl); } print "@data\n"; } # I've assumed you want the 'price' element (??) left alone unless 'qt +y' is zero # in which case set it to zero. __DATA__ 128,1,Download,0,,TEXT,2,Size,2,??,SM,3,??,MD,4,??,LG,5,??,XL 12,1,Download,0,,TEXT,2,Size,2,??,SM,3,??,MD,4,??,LG,5,??,XL 8,1,Download,0,,TEXT,2,Size,2,??,SM,3,??,MD,4,??,LG,5,??,XL

In reply to Re: Parsing and modifying CSV files by nedals
in thread Parsing and modifying CSV files by ch1

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