## scope.rb [ruby]
#!/usr/local/bin/ruby-1.9

foo, bar, awk, bla, ook = 1, 2, 3, 4, 5
squee = lambda do |bar,awk;bla|
  puts
  puts "Inside call, before alter"
  puts "\tfoo: #{foo.inspect}" rescue puts "\t#{$!}"
  puts "\tbar: #{bar.inspect}" rescue puts "\t#{$!}"
  puts "\tawk: #{awk.inspect}" rescue puts "\t#{$!}"
  puts "\tbla: #{bla.inspect}" rescue puts "\t#{$!}"
  puts "\took: #{ook.inspect}" rescue puts "\t#{$!}"
  puts "\tdon: #{don.inspect}" rescue puts "\t#{$!}"
  foo = -1
  bar = -2
  bla = -4
  ook = -5
  don = -6
  puts
  puts "Inside call, after alter"
  puts "\tfoo: #{foo.inspect}" rescue puts "\t#{$!}"
  puts "\tbar: #{bar.inspect}" rescue puts "\t#{$!}"
  puts "\tawk: #{awk.inspect}" rescue puts "\t#{$!}"
  puts "\tbla: #{bla.inspect}" rescue puts "\t#{$!}"
  puts "\took: #{ook.inspect}" rescue puts "\t#{$!}"
  puts "\tdon: #{don.inspect}" rescue puts "\t#{$!}"
end

puts "Before call"
puts "\tfoo: #{foo.inspect}" rescue puts "\t#{$!}"
puts "\tbar: #{bar.inspect}" rescue puts "\t#{$!}"
puts "\tawk: #{awk.inspect}" rescue puts "\t#{$!}"
puts "\tbla: #{bla.inspect}" rescue puts "\t#{$!}"
puts "\took: #{ook.inspect}" rescue puts "\t#{$!}"
puts "\tdon: #{don.inspect}" rescue puts "\t#{$!}"
squee.call(8,9)
puts
puts "After call"
puts "\tfoo: #{foo.inspect}" rescue puts "\t#{$!}"
puts "\tbar: #{bar.inspect}" rescue puts "\t#{$!}"
puts "\tawk: #{awk.inspect}" rescue puts "\t#{$!}"
puts "\tbla: #{bla.inspect}" rescue puts "\t#{$!}"
puts "\took: #{ook.inspect}" rescue puts "\t#{$!}"
puts "\tdon: #{don.inspect}" rescue puts "\t#{$!}"


## Output [plain_text]
adam-gardners-imac-g5:~/code/other projects/ruby adam$ ruby-1.9 scope.rb
Before call
        foo: 1
        bar: 2
        awk: 3
        bla: 4
        ook: 5
        undefined local variable or method `don' for main:Object

Inside call, before alter
        foo: 1
        bar: 8
        awk: 9
        bla: nil
        ook: 5
        undefined local variable or method `don' for main:Object

Inside call, after alter
        foo: -1
        bar: -2
        awk: 9
        bla: -4
        ook: -5
        don: -6

After call
        foo: -1
        bar: 2
        awk: 3
        bla: 4
        ook: -5
        undefined local variable or method `don' for main:Object