Fancy ivar subscript syntax

lambda_ivars.rb

class A
  def initialize
    @lambda = ->(x) { puts "lambda: #{x}" }
    @proc   = Proc.new { |x| puts "proc: #{x}" }
    @method = method(:_method)
  end

  def lambda(x)
    @lambda[x]
  end

  def proc(x)
    @proc[x]
  end

  def meth(x)
    @method[x]
  end

  private

  def _method(x)
    puts "method: #{x}"
  end
end

a = A.new

a.lambda("foo")
# => lambda: foo

a.proc("bar")
# => proc: bar

a.meth("baz")
# => method: baz

@supernullset, after giving this a look I remember now where I've seen it. When you described it, I thought there was something special about the subscript/square bracket syntax on ivars. We could also use .call or .() here as well.

ah ok. I did not think that this would work with a method definition; interesting.