Re: [Omaha.pm] Some lines of a file

["Robert Fulkerson" <robert.fulkerson@gmail.com>]

Y'know, I should be grabbing some of these ideas for quiz and exam questions.  :)  That's certainly the oddball kind of thing one of us goofball instructors would ask on an exam.  ;)

-- b

On Sat, Oct 25, 2008 at 7:37 AM, Jay Hannah <jay@jays.net> wrote:

A friend of mine asked me for this one yesterday.


Problem:

 Given STDIN print everything except the first 2 lines and last 4 lines.


Solution:

 while (<>) {
    push @in, $_;
 }
 print splice(@in, 2, @in - 6);


Note this is a terrible solution with large files (memory hog), but works fine on small STDIN.

Cheers,

j



$ cat j
one
two
three
four
five
six
seven
eight
nine
ten
$ cat j | perl j2.pl
three
four
five
six


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