Class: Scratch

Inherits:
Object
  • Object
show all
Defined in:
lib/lem.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Scratch

Returns a new instance of Scratch.



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# File 'lib/lem.rb', line 27

def initialize
  @dictionary = {}
  @stack = []
end

Instance Attribute Details

#stack ⇒ Object (readonly)

Returns the value of attribute stack.



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# File 'lib/lem.rb', line 25

def stack
  @stack
end

Instance Method Details

#add_words(dict) ⇒ Object 



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# File 'lib/lem.rb', line 32

def add_words(dict)
  dict.each do |k,v|
    @dictionary[k] = v
  end
end

#run(text) ⇒ Object 



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# File 'lib/lem.rb', line 38

def run(text)
  @lexer = ScratchLexer.new(text)
  @lexer.each do |word|
    word.upcase!
    if word.is_num?
      @stack.push word.to_f
    elsif @dictionary[word]
      @dictionary[word].call self
    else
      raise "Unknown word"
    end
  end
end