$ perl -le'
@strings = qw/ GNNTCGANNTT GAATCGNNNTT GANNCGNNNNN /;
for ( @strings ) {
    push @results, [];
    unshift @{ $results[ -1 ] }, length() - pos() while /N+/g;
    }                               
print "@$_" for @results;
'
2 8
2
0 7

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In reply to Re: Identifying Reverse Position of Specific Character in a String by jwkrahn
in thread Identifying Reverse Position of Specific Character in a String by monkfan

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