actually, brackets represent a block. A block is converted to class Proc with '&'. If the object that '&' is used on is not a block, Ruby will first attempt t

actually, brackets represent a block. A block is converted to class Proc with '&'. If the object that '&' is used on is not a block, Ruby will first attempt to convert it into a Proc by calling to_proc A Ruby block is always associated with a method, and cannot be captured in a variable without converting it back into a proc. This is done by 'removing' the '&' def return_block &block return block end