can we have that in writing.... account number 4567 7890 1234 5678
.... ok so thats not a real credit card but zero mine out just for the
laughs?
"Kipp, James"
<James.Kipp@m To: [EMAIL PROTECTED]
bna.com> cc:
Subject: RE: Head and Tail
06/22/01
02:03 PM
>>
> MBNA, eh? (japhy checks the credit card bills he
> receives...) ;) I guess
> it'd be in my best interest (no pun intended) to help you, then.
LOL !!! Actually I am a independent contractor, so I don't really work here
:-)
>
> Uri Guttman wrote File::ReadBackwards, available on CPAN,
> that can help
> you emulate tail(1).
Cool. I found a win32 Tail binary ported from GNU, but I rather stay away
from that route if I could.
>
> To emulate head(1), just read the first X lines of the file you want.
>
> DO NOT PUT THE FILE INTO AN ARRAY.
That is exactly what I was trying to avoid. So Just simply print the first
10 lines (records)?
> That is evil, as far as
> memory usage
> and efficiency go. (So it's evil, in general.)
I agree.
>
> use File::ReadBackwards;
>
> open HEAD, "< $file" or die "can't read $file: $!";
> for (1 .. 5) {
> push @head, scalar <HEAD>; # first 5 lines
> }
> close HEAD;
Ok, that is what I had in mind, just making sure there were not some better
ideas out there. This should work.
>
> tie *TAIL, 'File::ReadBackwards', $file or die "can't read
> $file: $!";
> for (1 .. 5) {
> unshift @tail, scalar <TAIL>; # last 5 lines
> }
> untie *TAIL;
>
> Notice how I unshift()ed to @tail -- this is so that the last
> 5 lines are
> stored in normal order in the array.
cool. Is the docs for this module available at CPAN ?
Thanks again.
If this works I will ZERO out your balance on your card .. :-)
JIm
>
>
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