sub resolve {
    my $strref = shift;
    my $strpos = shift;
    my $dictfh = shift;

    return [] if length($$strref) == $strpos;

    my $words;

    my $reset_fh = tell($dictfh);
    seek $dictfh,0,0;

    while(defined(local $_ = <$dictfh>)){

        chomp;
        if( substr($$strref,$strpos,length) eq $_ ){

            print "$_ at $strpos\n";

            if( my $w =
                  resolve($strref,$strpos+length,$dictfh)
                  ){
                $words = [$_,@$w];
                last;
            }

            print "<- $strpos\n";
        }
    }
    seek $dictfh,$reset_fh,0;

    return $words;
}


open my $dfh,'<','/usr/dict/words' or die $!;
my $string = 'whererangesarealltherage';

my $words = resolve( \$string, 0, $dfh );
print $words ? "@$words" : 'no words' , "\n";

close $dfh;

[download]

I've included some output that shows how the program "backtracks".

--
http://fruiture.de

In reply to Re: Junk NOT words by fruiture
in thread Junk NOT words by Anonymous Monk

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