From: Phrogz <phrogz@...>
Date: 2008-02-06T13:49:56+09:00
Subject: Re: Which version do I have then?

On Feb 5, 9:21 pm, Sebastian Komianos <seb...@grubies.gr> wrote:
> Hello there!
>
> After reading the first half of Chris Pine's online tutorial I decided
> to buy the book and here I am, preparing my MacBook Pro for my serious
> studying which I plan to begin in a few hours.
>
> However, since I am want everything to be up to date, I decided to
> update to Ruby 1.9.0 (I previously had 1.8.1). Following this
> (http://hivelogic.com/articles/ruby-rails-mongrel-mysql-osx/) I think I
> managed to do something, because when I type "ruby -v" on my terminal
> I...sometimes take this as the result: ruby 1.9.0 (2007-12-25 revision
> 14709) [i686-darwin8.11.1]
>
> The "sometimes" goes for the fact that the above only happens when my
> folder is "/usr/local/src/ruby-1.9.0". When I am at "/usr/local/src/" or
> below, I get this: ruby 1.8.1 (2003-12-25) [i686-darwin]. Which is quite
> confusing to me, since it looks like I have both version.
>
> Anyways, I have never had any previous experience with language building
> or something relevant so I would really appreciate it if you can tell me
> either how to update Ruby or that it doesn't really matter if I have a
> previous version. :P

You may have a variety of binaries installed with the same name, in
different directories. Which version you are using depends on which
binary is 'found' first.

Search for information on the PATH environment variable to understand
how *nix systems resolve the binaries. If you have further questions,
feel free to post again.

I personally have the built-in Ruby Leopard install in /usr/bin/ruby,
my own 1.8.6-p111 build in /usr/local/bin/ruby, and another 1.9 built
as ruby190.