Dear Monks,

I have a list of elements (A, B, C, ...). They have a value :1, 2, 5 . These elements A, B, C can appear more than one time in the list.

I would like to supress the cases that appear more than one time in my list, and for those that appear more than one time, I would like that the values that appear in the left column are added

Here is the start file ("delay_${day}.csv") 
1    A
0    B
3    C
0    A
2    C
5    A
3    E
1    E

[download]

Here is the file I would like to have in the end ("unique_delay_${day}.csv") 
6    A
0    B
5    C
4    E

[download]

I have made a code, but it does not seem to work. Could you tell me where did I go wrong ? 
#!/usr/bin/perl
use strict;
use warnings;

##################################
##  ARGUMENTS OF THE SCRIPT 
##################################

# the argument due to be used is
# the ALL_FT file

#####################################
# do not forget the $ before the ARGV
#####################################

# the format of the ALL_FT file has to be : $date.ALL_FT (ex: 20060904
+.ALL_FT)
my $ALL_FT_file = "$ARGV[0]";

################# END OF THE DECLARATION OF THE ARGUMENTS

my $Current_Dir = `pwd`;
# print STDOUT "the current directory is $Current_Dir";



# name of the OUTFILE

# the day appears in the name of the OUTFILE
my $day = $ALL_FT_file;

# the following command is used to skip the .ALL_FT in the name of the
+ ALL_FT_file
# and thus to have the date 
$day =~ s/.ALL_FT//; 


# open the ALL_FT file 
open(INFILE,"<delay_${day}.csv") or die "Can't open : delay_${day}.csv
+: $!";


# to open the file
# OUTFILE is the name of the HANDLE in this case
  open (OUTFILE, ">unique_delay_${day}.csv") ;

# creation of a table
my @New_Table;

    while (<INFILE>) {

    # the lines are composed of elements separated by a point comma
    my $Line = $_;
    chomp($Line);
        my @Elements = split(";", $Line);
    push(@New_Table, $Elements[2]);
    }

print @New_Table;
    my %Hash   = map { $_, 1 } @New_Table;

my @unique = keys %Hash;

    
close INFILE;
close OUTFILE;

[download]

In reply to suppress the elements that appear more than one time in a list by steph_bow

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