Just learning a bit of CoffeeScript

playing.coffee

# represents a person
class Person
  
  # properties
  name: null
  alive: true
  stomach: 0
  bladder: 0
  
  # class constructor
  constructor: (@name, @alive = true) ->
    throw "Name is required" if !@name
  
  # eat something
  eat: (quantity) ->
    @stomach += quantity
    @die 'burst stomach' if @stomach >= 100
  
  # drink something
  drink: (quantity) ->
    @bladder += quantity
    @die 'ruptured bladder' if @bladder >= 100
  
  # die
  die: (cause) ->
    if @alive
      @alive = false
      console.log "#{ @name } died of #{ cause }"


# represents rowan
class Rowan extends Person
  
  # properties
  happiness: 0
  
  # class constructor
  constructor: (@alive = true) ->
    super 'Rowan', @alive
  
  # eat something
  eat: (quantity, type = 'food') ->
    switch type
      when 'cheese' then @happiness += quantity * 10
      when 'beetroot' then @happiness += quantity * 5
    super quantity
  
  # drink something
  drink: (quantity, type = 'drink') ->
    switch type
      when 'beer' then @happiness += quantity * 10
      when 'tea' then @happiness += quantity * 5
    super quantity


# usage example
rowan = window.rowan = new Rowan
rowan.eat 5, 'cheese'
rowan.eat 42, 'olives'
rowan.drink 50, 'tea'
rowan.drink 65, 'beer'