in reply to Fixed Position Column Records

Thank you grep and BrowserUk.
below is a replacement for my first foreach statement which works better than my original code thanks to the suggestion by grep.
my $f2 = $pos[1] - $pos[0]; my $f3 = $pos[2] - $pos[1]; my $f4 = $pos[3] - $pos[2]; my $f5 = $pos[4] - $pos[3]; foreach $line (@data) { my $pictureline = "a$pos[0] a$f2 a$f3 a$f4 a$f5"; print unpack( $pictureline, $line ), "\n"; }
And thank you again BrowserUk for a more elegant solution altogether.

Replies are listed 'Best First'.
Re^2: Fixed Position Column Records
by BrowserUk (Pope) on Jul 22, 2007 at 04:49 UTC

    Posted here to ensure it comes to the OPs attention.

    Replace the regex used by the pattern building code with

    while $mask =~ m[([^ ]+)( +|$)]g;

    That is, replace \S and \s with literal spaces as the ORing process can generate chr(9) and other characters that would be treated as whitespace and so create false columns.

    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    "Science is about questioning the status quo. Questioning authority".
    In the absence of evidence, opinion is indistinguishable from prejudice.