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Matching and concatenating similar Eventids

by chanakya (Friar)
on Jun 02, 2006 at 14:33 UTC ( #553303=perlquestion: print w/replies, xml ) Need Help??

chanakya has asked for the wisdom of the Perl Monks concerning the following question:

Dear Monks,

Greetings. I'm having 10 input files in CSV format. I've written a method that
will return the data as a hash in a pipe delimeted format, so for 10 csv files I have 10 hashes with data populated.

Below is the format of all the 10 csv file (well the data may vary):
# 69 CHANGES DAILY_FILE_EM + 20060601 # 1 Status status +S 20 0 # 2 Event ID event_id +N 10 0 # 3 Effective Date ex_date +D 8 0 # 4 Last updated date last_updated_date +D 8 0 # 5 First entry date first_entry_date +D 8 0 # 6 Current country current_country +S 2 0 # 7 New country new_country +S 2 0 # 8 Current security name current_sec_name +S 24 0 # 9 New security name new_sec_name +S 24 0 # 10 RR Security code rr_sec_code S + 8 0 AAB>>>>>>>>>>>AAA>>>>>>>>>AAB>>>>>>>AAA>>>>>>>AAB>>>>>>>AAA>AAA>AAA>>> +>>>>>>>>>AAB>>>>>>>>>AAA>>>>>>>>>>> CONFIRMED 13336 20060602 20060601 20060601 TR T +R AYGAZ AYGAZ 15675 +.01 CONFIRMED 12995 20060601 20060511 20060511 KR K +R DAEWOO CO DAEWOO CO 15 +216.01 CONFIRMED 12995 20060601 20060511 20060511 KR K +R WOORI WOORI + 15262.01 CONFIRMED 12995 20060601 20060511 20060511 JO J +O JORDAN SEC JORDAN SEC 22 +318.01 CONFIRMED 12995 20060601 20060511 20060511 J +O CAIRO FIN 15178 +.01 CONFIRMED 12995 20060601 20060511 20060511 JO J +O ILFS ILFS 15 +177.01 CONFIRMED 12995 20060601 20060511 20060511 JO J +O PP PETROL. REFINERY PP PETROL. REFINERY 15194 +.01 CONFIRMED 12995 20060601 20060511 20060511 MX M +X WALMART WALMART 15306. +04 CONFIRMED 12995 20060601 20060511 20060511 MX + VITRO A 15333. +01 EXPECTED 13266 20060612 20060526 20060526 TR + TR TURKCELL TURKCELL +23769.01 #EOD *
I'm parsing the csv files using the following code:
use strict; use warnings; use Data::Dumper; my $file_ss = "/tmp/ONE_ACE.csv"; my $file_sc = "/tmp/TWO_ACE.csv"; my $data_ss = get_csv_data($file_ss); my $data_sc = get_csv_data($file_sc); print Dumper($data_ss); #data of the first csv file my $out_file="/tmp/aggregate.csv"; my $output_header="FileName,Status,Event ID,RR Security Code"; my $output_body = "DATA returned from the the matching eventids/rr_sec +urity_code";TODO sub get_csv_data { my $open_file = shift; my ($curr_country_currency, $new_country_currency, ); #Actual data is after line "AAB>>>>" my %data=(); #local $/=">>>\n"; if (!-f"$open_file") { report("Abort","Could not find $open_file file"); exit 1; } open(DATA,"$open_file"); while(<DATA>) { #Actual data after the line SSL>>>>>SSV>>>>> if(/AAB>>>>/ .. /#EOD/){ chomp; s///g; s/^\s+//g; next if /^$/; next if /AAA>>/; next if /AAB>>/; my($status, $event_id, $effdate, $last_updated, $entry_da +te, $curr_country, $new_country, $curr_sec_name, $new_sec_name, $msci_sec_code) = split(/\|/); $data{$open_file} = "$open_file|$status|$event_id|$ms +ci_sec_code"; } } #while close DATA; return (%data); }
Now the problem part. We will allow repeated "Event ID" that are from the same file, but do not include the data of a row if it is a repeated "Event Id" and "RR Secutiry Code" from a different csv file, instead I need to concatenate its FileName to the oldFileName, i.e for example:
File A ('a') and File B ('b') - File A's data has already been scanned
Pseudo code: If a.Event ID = b.Event ID { If a.FileName = b.FileName { If a.RR Security code = a.RR Security code FileName = FileName + '/' + b.FileName (e.g. if (a)FileName = 'ONE_ACE' and b.FileName = 'TWO_ACE', the +n FileName = 'ONE_ACE/TWO_ACE') Return nothing; Else Return data of row to be included in output file; } Else Return data of row to be included in output file; } Else Return data of row to be included in output file;
I need some suggestions/pseudo code to implement the same.
Thanks in advance.

Replies are listed 'Best First'.
Re: Matching and concatenating similar Eventids
by MonkE (Hermit) on Jun 02, 2006 at 17:05 UTC
    If I understand your problem correctly, I recommend that you use a binding operator like so in case of a duplicate:
    if (you-have-a-duplicate) { $data{$other_file} =~ s/^([^\|]*)\|/\1\/$other_file\|/; $data{$open_file} = "$open_file/$other_file|$status|$event_id|$msci +_sec_code"; }
    This will add the filename to both the open file and the "other" file's entry.

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