Re: how to remove characters before and after a search pattern in a string?

[thunders]

since your pattern is a simple string, you can use index and substr.

my $str = "ACGTTGGCTATTGGGCCCGCT";
my $pattern = "GTT";
my $offset = index($str,$pattern) + length($pattern) + 3;
$str = substr($str,$offset);
print $str;

[jwkrahn]

Probably better as:

my $str     = "ACGTTGGCTATTGGGCCCGCT";
my $pattern = "GTT";

if ( ( my $offset = index $str, $pattern ) >= 0 ) {                   
+   
    substr $str, 0, $offset + length( $pattern ) + 3, "";
    }                                                
print $str;