Coffeescript類命名空間方法

Question

 class SocialStudies
      constructor : (@val1,@val2) ->
          console.log 'constructed '+@val1+' | '+@val2
      doAlerts :
          firstAlert : =>
               alert @val1
          secondAlert : =>
               alert @val2

 secondPeriod = new SocialStudies 'git to class!', 'no recess for you!'

 secondPeriod.doAlerts.firstAlert() // error this.val1 is not defined

希望你明白了。 我想從方法中的方法集中訪問@val1 ，而胖箭頭什么都不做！ 有誰知道該怎么辦？

Answer 1

 class SocialStudies
      constructor : (@val1,@val2) ->
          console.log 'constructed '+@val1+' | '+@val2
          @doAlerts =
            firstAlert : =>
                alert @val1
            secondAlert : =>
                alert @val2

Answer 2

當然，你也可以這樣做：

class SocialStudies
  constructor: (@val1, @val2) ->
    @doAlerts = firstAlert: @firstAlert, secondAlert: @secondAlert
  firstAlert: =>
    alert @val1
  secondAlert: =>
    alert @val2

這等同於Keith Nicholas的答案，但允許在繼承類的方法中使用super關鍵字，所以你可以這樣做：

class AntiSocialStudies extends SocialStudies
  secondAlert: =>
    @val2 += ' no solitary drinking until 3PM.'
    super

secondPeriod = new AntiSocialStudies 'git to class!', 'no recess for you!'
secondPeriod.doAlerts.secondAlert()