From: Joel VanderWerf <vjoel@...>
Date: 2008-10-27T11:43:55+09:00
Subject: Re: Join all text files in a folder, with a single line of Ruby code

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.

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407