gistfile1.rb

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

class Symbol
  def to_h(&block)
    Hash[to_sym, block && (block.call || eval(to_s, block))]
  end
end

class Array
  def to_h(&block)
    flatten.inject({}){|h, v| h.update(v.to_h(&block))}
  end
end

a = 4
b = 2
c = 42

p [:a, :b, :c].to_h{}


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