Re: Modification of read only values.

[JavaFan]

You cannot modify number variables. Make a copy first:

while ($text =~ m/(TATAAT|TTGACAT)\w+[^ATG]?(ATG\w+)[^TAG|TAA|TGA]?/g)
+ {
    my $match = $2;
    $match =~ tr/ATGC/UACG/;
    print $match;
}