Passing hashes instead of method parameters [closed]

Answer 1

Hashes are particularly useful to pass multiple optional arguments. I use hash, for example to initialize a class whose arguments are optional.

EXAMPLE

class Example

def initialize(args = {})

  @code

  code = args[:code] # No error but you have no control of the variable initialization. the default value is supplied by Hash

  @code = args.fetch(:code) # returns IndexError exception if the argument wasn't passed. And the program stops

  # Handling the execption

  begin

     @code = args.fetch(:code)

  rescue 

 @code = 0

  end

end