mecab.tut.rb

#!/usr/bin/env ruby
# coding: utf-8

require "forwardable"
require "csv"

require "MeCab"

class Mecab
  def self.wakati
    new "-O wakati"
  end

  def initialize(output)
    @mecab = MeCab::Tagger.new output
  end

  def parse(str)
    n = @mecab.parseToNode str

    begin
      yield Node.new n
    end while n = n.next
  end

  class Node
    extend Forwardable

    def initialize(node)
      @node = node
    end

    %i(
      surface length rlength id rcAttr lcAttr
      posid char_type stat isbest alpha beta
      prob wcost cost
    ).each{|m|
      def_delegator :@node, m
    }

    def feature
      Hash[%w(品詞 品詞細分類1 品詞細分類2 品詞細分類3 活用形 活用型 原形 読み 発音).zip(CSV.parse_line(@node.feature))]
    end
  end
end

if $0 == __FILE__
  require "pp"

  Mecab.wakati.parse("月が綺麗ですね"){|n|
    puts [
      n.feature["品詞"],
      n.surface,
      n.cost
    ].join("\t")

    # p n.surface if n.feature["品詞"] == "名詞"

    # p %i(
    #   surface length rlength id rcAttr lcAttr
    #   posid char_type stat isbest alpha beta
    #   prob wcost cost
    # ).map{|m|
    #   n.send(m)
    # }
  }
end