christopherslee

{
	// Place your global snippets here. Each snippet is defined under a snippet name and has a scope, prefix, body and
	// description. Add comma separated ids of the languages where the snippet is applicable in the scope field. If scope
	// is left empty or omitted, the snippet gets applied to all languages. The prefix is what is
	// used to trigger the snippet and the body will be expanded and inserted. Possible variables are:
	// $1, $2 for tab stops, $0 for the final cursor position, and ${1:label}, ${2:another} for placeholders.
	// Placeholders with the same ids are connected.
	// Example:
	// "Print to console": {
	// 	"scope": "javascript,typescript",

christopherslee

class Field(object):
    def __init__(self, name):
        self._name = name

    def __get__(self, instance, owner):
        return instance._data[self._name]

    def __set__(self, instance, value):
        instance._data[self._name] = value

christopherslee

# lib/part_3/advanced_credit_score.rb
require_relative 'advanced_consumer'

class AdvancedCreditScore

  def self.simulate(&block)
    consumer = AdvancedConsumer.new

    # TODO Part 3
    # Once again, use instance eval to invoke the block on the consumer

christopherslee

# lib/part_2/customer.rb

class Customer
  attr_accessor :balance

  def good_standing?
    balance >= 0
  end
end

christopherslee

# lib/part_2/credit_score.rb
require_relative 'consumer'

module CreditScore
  def self.simulate(&block)
    consumer = Consumer.new
    consumer.instance_eval(&block)
    consumer.score
  end
end

christopherslee

datasource.methods.grep(/^get_(.*)_value/) { Customer.has_field $1 }

christopherslee

class Customer
  attr_reader :id, :datasource

  def initialize(id, datasource)
    @id = id
    @datasource = datasource
  end

  def respond_to?(method)
    datasource.respond_to?("get_#{method}_value") || super

christopherslee

class Customer
  attr_reader :id, :datasource

  def initialize(id, datasource)
    @id = id
    @datasource = datasource
  end

  def method_missing(methodname, *args, &block)
    super unless @datasource.respond_to? "get_#{methodname}_value"

christopherslee

class Customer
  attr_reader :id, :datasource

  def initialize(id, datasource)
    @id = id
    @datasource = datasource
    @datasource.methods.grep(/^get_(.*)_value/) { Customer.has_field $1 }
  end

  def self.has_field(fieldname)

christopherslee

class Customer
  attr_reader :id, :datasource

  def initialize(id, datasource)
    @id = id
    @datasource = datasource
  end

  def self.has_field(fieldname)
    define_method fieldname do