Ideal implementation of TradeAPI - factors out details of retrieving key/secret

tapi2.rb

#! /usr/bin/env ruby

class TradeAPI
  attr_accessor :key
  attr_accessor :secret

  def initialize(key, secret)
    @key    = key
    @secret = secret

    unless @key && @secret
      # throw exception, key and secret must be set
      raise ArgumentError, "Both key and secret must be set."
    end
  end
end


#t1 = TradeAPI.new
t2 = TradeAPI.new('keyisthekey', 'übersecret')

puts "t2 key    = #{t2.key}"
puts "t2 secret = #{t2.secret}"

t2.key = 'GrandMasterKey!'

puts "t2 key    = #{t2.key}"
puts "t2 secret = #{t2.secret}"