From: Ryan Davis <ryand-ruby@...>
Date: 2010-12-15T08:21:20+09:00
Subject: Re: Grep a string


On Dec 14, 2010, at 07:21 , Rob Biedenharn wrote:

> Well, you asked on a Ruby list so you're getting a Ruby answer from me.
> 
> crontab -l | ruby -nle 'next if $_ =~ /^\s*#/; fields = $_.split(" ",6); puts fields.inspect;'

Don't forget the -a flag!

% ruby -h | grep -- -a
  -a              autosplit mode with -n or -p (splits $_ into $F)
  -Fpattern       split() pattern for autosplit (-a)

so you can do something like:

% ruby -nae 'next unless $_ =~ /^[\d\*]/; p $F' crontab.envy.zenspider.com 
["*/5", "*", "*", "*", "*", "~/Work/p4/zss/src/scripts/dev/p4autotest.sh"]
["*/5", "*", "*", "*", "*", "~/Work/p4/zss/src/scripts/dev/p4review.py"]
["*/15", "*", "*", "*", "*", "/Volumes/Users/www/zenspider.com/bin/webupdate.sh"]
["0", "*", "*", "*", "*", "(imap_cleanse", "&&", "imap_flag)", "&>", "/dev/null"]
["12", "*", "*", "*", "*", "cd", "~/Work/git/synchronizer", "&&", "rake", "-s", "sync"]