From: Alex DeCaria <alex.decaria@...>
Date: 2010-02-21T10:33:40+09:00
Subject: Re: Specifying Ruby Version from Command Line

Eustáquio Rangel wrote:
> 2010/2/20 Alex DeCaria <alex.decaria@millersville.edu>:
>> I have two versions of Ruby installed (1.8 and 1.9). �When starting a
>> Ruby script from the command window, how do I specify which version of
>> Ruby I want to use? � I'm assuming there is some option for this that I
>> can set, but I don't know what it is.
> 
> What OS are you running, and how did you install both versions?

I am using Windows 7 Professional (64-bit).  I previously had Ruby 1.8.6 
installed using the old 1-click installer.  I then installed Ruby 1.9 
using the windows installer found at RubyIntaller.org.

The Ruby 1.9 is automatically installed in a different directory 
(C:\Ruby19 instead of C:\Ruby) so the two installs are independent.  I 
have made Ruby 1.9 the default (it is the only one in my Path).  So, as 
was suggested earlier, to run a Ruby 1.8 program I just issue the 
command 'C:\Ruby\bin  myprogram.rb'.  To run a Ruby 1.9 program I just 
do 'ruby my program.rb'

It is working great.  Thanks everyone!

--Alex
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