日本語をわいらの言葉に変換するやで

wailang.rb

# -*- encoding:utf-8 -*-

require 'natto'

@natto = Natto::MeCab.new

def conv(jp_text)
  words = []
  @natto.parse(jp_text) do |n|
    break if n.is_eos?
    case n.feature.split(',')[0]
      when '名詞'
        words << 'わい'
      else words << n.surface
    end
  end
  words.join('')
end

puts conv gets.chomp