From: Joel Pearson <lists@...>
Date: 2013-01-11T23:54:02+09:00
Subject: Re: How Ruby environment varibles work in realtime program?

Oops, forgot the dollar signs. FYI that's a single line of code, it gets 
put onto 2 lines by a line character limit on the forum.

[$DLN_LIBRARY_PATH, $HOME, $LOGDIR, $RUBYOPT, $RUBYSHELL].each {|var| 
puts var }

When I run that in IRB they all come out as nil, presumably because in 
that environment they aren't set.

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