gistfile1.rb

# regarding : http://gist.github.com/157782
# regarding : http://drawohara.com/post/151193800/ruby-symbol-to-hash
#

class Binding
  def map *vars
    vars.flatten.compact.inject({}){|h,v| h.update v => eval(v.to_s, self)}
  end
  alias_method '>', 'map'
end

a = 4
b = 2
c = 42

p binding > [:a, :b, :c]
p binding > :a
p binding > [:a,:c]

__END__
cfp:~ > ruby a.rb
{:a=>4, :b=>2, :c=>42}
{:a=>4}
{:a=>4, :c=>42}