From: Mike Hall <mghall@...>
Date: 2002-07-23T03:25:07+09:00
Subject: Re: piping into ruby at command line

Shashank Date wrote:

> How do I make something like this work ?

> % cat junk.txt | ruby -e "puts $_"

> I cannot seem to make ruby accept std input when it is in a "pipe"  mode at
> command line.

   cat file | ruby -n -e 'puts $_'  

Some related switches:

  -e 'command'    one line of script. Several -e's allowed.
  -n              assume 'while gets(); ... end' loop around your script
  -p              assume loop like -n but print line also like sed
  -a              autosplit mode with -n or -p (splits $_ into $F)
  -Fpattern       split() pattern for autosplit (-a)

Good luck!

--
Mike Hall
http://www.enteract.com/~mghall