From: MonkeeSage <MonkeeSage@...>
Date: 2007-12-25T07:29:59+09:00
Subject: Re: no method error (because of unknown variable type)

On Dec 22, 1:00 pm, "Haris Bogdanovic" <fbogdano...@xnet.hr> wrote:
> Problem solved !
>
> It's because the file was opened as 'w' and not 'r'. I firstly created file
> and put some data into it and then I forgot to close it and reopen it as
> 'r'.
> It was strange to me that ruby would check for variable types in that way
> but obviously I was assuming wrong.
>
> Thanks.
>
> "Haris Bogdanovic" <fbogdano...@xnet.hr> wrote in message
>
> news:fkjhnd$c6f$1@garrison.globalnet.hr...
>
> > Hi !
>
> > Here is a little example:
>
> > file "Functions.rb":
> > #---------------------
> > def func(file)
> >    if !file.eof then #do something.
> > end
> > #---------------
>
> > file "main.rb":
>
> > require 'Functions'
> > file_1=open('bla.txt','w')
> > func(file_1)
> > file_1.close
>
> > I get an error message that eof method is undefined.
> > I presume that this is because ruby does not know that the "file" variable
> > is going to become a File.object.
> > How do I solve this ?
>
> > Thanks.

You can use 'r+' as the open mode if you want reading and writing
(rather than closing and reopening the file handle or using
IO#reopen). See `ri IO` (near the middle) for a list of available open
modes.

Regards,
Jordan