Simple StringReader class in CoffeeScript which can be used to extract specific tokens from a bigger string. Inspired by http://brandoncodes.wordpress.com/2012/04/07/add-some-syntactical-sugar-to-your-coffeescript/

gistfile1.coffee

class StringReader
  buffer = ""

  constructor: (@input) ->
    @reset()

  readUntil: (character, omitCharacter = false) ->
    loop
      break if @currentIndex is @input.length

      if character.length is 1
        break if @input[@currentIndex] is character
      else
        skip = true

        counter = 0
        for c in character
          unless @input[@currentIndex + counter] is c
            skip = false
            break

          counter++

        break if skip

      buffer += @input[@currentIndex]
      @currentIndex++

    @currentIndex += character.length if (omitCharacter)

    buffer

  clearBuffer: -> buffer = ""

  reset: ->
    @currentIndex = 0
    @clearBuffer()

  end: -> @currentIndex is @input.length