Question

I want to use an options hash as input to a method in Ruby, but is there a way to quickly set all eponymous variables (i.e having the same name) instead of setting each individually?

So instead of doing the following:

class Connection
  def initialize(opts={})
    @host     = opts[:host]
    @user     = opts[:user]
    @password = opts[:password]
    @project  = opts[:project]
    # ad nauseum...

is there a one-liner that will assign each incoming option in the hash to the variable with the same name?

Answer 1

def initialize(opts={})
  opts.each { |k,v| instance_variable_set("@#{k}", v) }
end