How do I re-pass multiple method arguments in Ruby 1.8.5?

Question

I'm using ruby 1.8.5 and I'd like to use a helper method to help filter a user's preferences like this:

def send_email(user, notification_method_name, *args)
  # determine if the user wants this email
  return if !user.send("wants_#{notification_method_name}?")

  # different email methods have different argument lengths
  Notification.send("deliver_#{notification_method_name}", user, *args)
end

This works in ruby 1.8.6, however when I try to do this in 1.8.5 and try to send more than one arg I get an error along the lines of:

wrong number of arguments (2 for X)

where X is the number of arguments that particular method requires. I'd rather not rewrite all my Notification methods - can Ruby 1.8.5 handle this?

it would be great to upgrade. Unfortunately that doesn't fit in the scope of my current project. Or answer my question regarding how to do this in 1.8.5 :) — ddux, Nov 29 '10 at 15:00

score 0 · Answer 1 · answered Nov 29 '10 at 04:02

A nice solution is to switch to named-arguments using hashes:

def  send_email(args)
  user = args[:user]
  notification_method_name = args[:notify_name]

  # determine if the user wants this email
  return if !user.send("wants_#{notification_method_name}?")

  # different email methods have different argument lengths
  Notification.send("deliver_#{notification_method_name}", args)
end

send_email(
  :user        => 'da user',
  :notify_name => 'some_notification_method',
  :another_arg => 'foo'
)

How do I re-pass multiple method arguments in Ruby 1.8.5?

1 Answers1