From: Manuel Zabelt <ng@...>
Date: 2001-05-24T07:11:23+09:00
Subject: [ruby-talk:15626] $& works -- md[0] does not

Hello!

The follwing snippet of code does not work:

08:File.open('/var/log/online') do |f|
09:  f.each do |line|
10:    md = /\d+\.\d+\.\d+\.\d+/.match line
11:    ips[md[0]]+=1 if md[0]
12:  end
13:end

Error message:

./isdn.rb:11: undefined method `[]' for nil (NameError)
        from ./isdn.rb:9:in `each'
        from ./isdn.rb:9
        from ./isdn.rb:8:in `open'
        from ./isdn.rb:8

BUT the follwing snippet of code DOES work:

08:File.open('/var/log/online') do |f|
09:  f.each do |line|
10:    md = /\d+\.\d+\.\d+\.\d+/.match line
11:    ips[$&]+=1 if $&
12:  end
13:end

What am I doing wrong? Being about this for 60 minutes now, I get kind
of frustrated slowly ...

thanks for any help
greetings
  manu