Probably should use Text::CSV to parse the data, but in this case cheating isn't too bad:

use strict;
use warnings;

my %data;
map {$data{0+$_ =~ s/[ ,].*\n?//r} = $_} <DATA>;
print $data{0+$_} for qw( 10.1 100.1 25.1 103.1 );

__DATA__
100.1,A ,25, 36,56,89,45,36,56
25.1 ,B,232,565,65,56,56,48,25
103.1,C,25,5,6,9,4,5,56,889,9
10.1,D,5,6,5,8,9,8,12,23,36,6

[download]

You'd still have to account for duplicate entries and such

In reply to Re: arranging the csv file by Loops
in thread arranging the csv file by Anonymous Monk

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