From: Robert Klemme <bob.news@...>
Date: 2006-03-14T01:38:55+09:00
Subject: Re: Recursive line counter (review?)

ChrisH wrote:
> I like your use of inject.  However, the code you show is not
> recursive, but thats not really important unless it being recursive
> was the point...
>
> When I was playing with a similar bit of code I recall using
> <code>
> IO.readlines('filename').size
> </code>

This doesn't work well with large files and also uses more resources
(memory).

> I also recall trying
> <code>
> f=File.open('filename')
> f.seek(0,IO::SEEKEND)
> lc = f.lineno
> </code>

Does this really work?  I can't believe it because during seeking the file
is actually not read - so the IO instance cannot really count line
numbers, can it?

> If speed is an issue oyu might want to compare various methods.

Yeah.

Kind regards

    robert