Two suggestions:
  1. Get in the habit of using the 'other' notation for instantiating an object: 
    my $fh = IO::File->($datafile) or die;

#instead of - and you don't need the quotes either
my $fh = new IO::File "$datafile";

    [download]
    The reason is because is purely habit. One day you will write your own classes, and they may use inheritance, which is where the other style will bit you. Tis a shame i think, because it just _looks_ so much nicer. ;)

  2. In the while loop inside the closure, why not just use this: 
    while (<$fh>) {
    chomp;
    # use $_ instead of $row
    # etc . . .

    [download]
    Now you don't need the last, and while(1) just looks evil. >:)

Otherwise, nice i like it. Damian Conway discusses using closures to implement iterators in his awesome OO book. You can find a snippet at (jeffa) Re: Defining Arrays.

Jeff 

R-R-R--R-R-R--R-R-R--R-R-R--R-R-R--
L-L--L-L--L-L--L-L--L-L--L-L--L-L--

In reply to (jeffa) Re: Closures as Itterators by jeffa
in thread Closures as Itterators by blakem

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