hello monks,

I try to read the RNA triplet code into a hash, where the triplets are keys, and the one letter code of amino acids are the values. I read the information from an txt file that has the following structure: :

X whitespace codon_1 codon_2 ...

. . .

X stands for the Letter of the amino acid

Here's my code

my %code;
my $file = 'code.txt';
open (READ, $file) || die "Cannot open $file: $!\n";

while (my $line = <READ>){
    chomp $line;
    if ($line =~ /^(\w+)\s+([\w]+)$/i){
        (%code) = (
        "$2" => $1
        );
        next;
    }
    if ($line =~ /^(\w+)\s+([\w]+)\s+([\w]+)$/i){
        (%code) = (
        "$2" => $1, "$3" => $1
        );
        next;
    }
    if ($line =~ /^(\w+)\s+([\w]+)\s+([\w]+)\s+([\w]+)$/i){
        (%code) = (
        "$2" => $1, "$3" => $1, "$4" => $1
        );
        next;
    }
    if ($line =~ /^(\w+)\s+([\w]+)\s+([\w]+)\s+([\w]+)\s+([\w]+)$/i){
        (%code) = (
        "$2" => $1, "$3" => $1, "$4" => $1, "$5" => $1
        );
        next;
    }
    if ($line =~ /^(\w+)\s+([\w]+)\s+([\w]+)\s+([\w]+)\s+([\w]+)\s+([\
+w]+)$/i){
        (%code) = (
        "$2" => $1, "$3" => $1, "$4" => $1, "$5" => $1, "$6" => $1
        );
        next;
    }
    if ($line =~ /^(\w+)\s+([\w]+)\s+([\w]+)\s+([\w]+)\s+([\w]+)\s+([\
+w]+)\s+([\w]+)$/i){
        (%code) = (
        "$2" => $1, "$3" => $1, "$4" => $1, "$5" => $1, "$6" => $1, "$
+7" => $1
        );
        next;
    }
}

foreach (keys %code){
    print $_, "\t", $code{"$_"}, "\n";
}
[download]

the output i get is just the last line (UAA, UAG, UGA Stop). Could anyone indicate the problem?

thanks in advance

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