From: Farrel Lifson <farrel.lifson@...>
Date: 2006-06-24T00:07:49+09:00
Subject: Re: Warning message about "initialized constant"

On 23/06/06, Peter Bailey <pbailey@bna.com> wrote:
> This is part of a script I use that simply ftps a bunch of files over to
> a UNIX server at my company. It does work, but, I keep getting a warning
> message from RUBY about "rb:20:warning: already initialized constant
> BWDFile". The line 20 it's referring to is my line 5 below.
>
> Thanks for any help.
> -----------------------------------------------------------------------------------
> ...
> 1 ftp = Net::FTP.open('quark.bna.com') do |ftp|
> 2 ftp.login('xxxxxx','xxxxxxxx')
> 3 ftp.chdir('/xxxxx/xxx/xxd/xxxx')
>
> 4 BWDFiles=Dir.glob("*.{pdf,gif}")
> 5 BWDFiles.each do |BWDFile|
> 6       ftp.putbinaryfile(BWDFile)
> 7       FileUtils.rm(BWDFile)
> 8       end
> 9 end
>
> --
> Posted via http://www.ruby-forum.com/.
>
>

Variable names beginning with uppercase are treated as constants by
the Ruby interpreter. In the first iteration of the each loop the
line:
  BWDFiles.each do |BWDFile|
assigns to BWDFile the first element of BWDFiles. In the next
iteration it tries to set BWDFiles to the second element but because
BWDFile is a constant it generates the warning.

Farrel