From: dblack@...
Date: 2003-03-29T05:53:54+09:00
Subject: Re: scanf failing(?) for floats read from a file

Hi --

On Sat, 29 Mar 2003, Bil Kleb wrote:

> I'm beginning to use scanf (thanks David, Hal, Noland, and Jason!) to
> read some floats.
>
> However, I am getting some bad data from it when using it to read
> data from a file.
>
> For example, simply varying the trailing spaces,
>
>   require 'scanf'
>
>   File.open 'temp', 'w' do |f|
>    f.puts '0.0 1.23'
>    f.puts '1.1 1.23 '
>    f.puts '2.2 1.23  '
>   end
>
>   File.open 'temp' do |f|
>    6.times{ puts f.scanf '%f' }
>   end
>
> produces,
>
>   0.0
>   1.23
>   1.1
>   0.23
>   2.2
>   23.0
>
> Any ideas?  Am I supposed to be using something else?

Yes.  Rewind to scanf-1.1.0 :-(  I fear I've introduced a glitch
somewhere in 1.1.1.  (It passes all the tests but apparently we need
some more tests :-) This is my fault -- I did what I thought was some
successful refactoring but apparently it wasn't entirely.

If you need me to I can mail you 1.1.0, and I'll talk to Hal about
putting it back on the site.

Thanks for reporting it --


David

-- 
David Alan Black
home: dblack@superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav