From: "Peña, Botp" <botp@...>
Date: 2008-10-27T14:13:30+09:00
Subject: Re: Join all text files in a folder, with a single line of Ruby code

From: Joel VanderWerf [mailto:vjoel@path.berkeley.edu] 
# luisbebop wrote:
# >> ruby -pe'1' *
# > 
# > Can you explain ? Sorry, but I didn't understand.
# If you run this in a shell, the * expands to all files. 
# The -p switch means "for each  line in the files on the
# command line, store  the line into $_, and print $_. 
# Usually, you want to use -e'some code' to operate 
# on $_. In this case, the '1' is a no-op, so it just 
# prints the line without changing it. HTH.

wc also means,

  ruby -pe '' *