pry_gist.rb

class Blah
  def add(x, y)
    x + y
  end
end
# => nil
class Symbol
  def call(*args, &block)
    ->(o) { o.send(self, *args, &block) }
  end
end
# => nil
ary = Array.new(5) { Blah.new }
# => [#<Blah:0x007fd0ff1119d0>,
#     #<Blah:0x007fd0ff1119a8>,
#     #<Blah:0x007fd0ff111980>,
#     #<Blah:0x007fd0ff111958>,
#     #<Blah:0x007fd0ff111908>]
ary.map(&:add.(5, 6))
# => [11, 11, 11, 11, 11]

.( looks so wrong. Why not &:add.bind(5, 6)? C++ flavoured ;)