From: John Maclean <jayeola@...>
Date: 2008-04-24T19:19:08+09:00
Subject: Executing systems commands

=begin
Hey chaps. 

I'm using an array to find the locations of various commands on a
system. Three versions of the same thing. Two work and one doesn't. Any one
know why?
=end

# here's an array of commands that we want to find
k = %w[ ruby xterm enlightenment emacs]


#why does this work?
k.each do |x|
  p system("which #{x}")
end

# and this work
k.each do |x|
  p system("whereis #{x}")
end


# but this doesn't
k.each do |x|
  p system("type -p #{x}")
end


__END__ 
Regards,

 - jjm