言語処理100本ノック2015

06.rb

require 'set'

def bigram(str)
  size = str.size
  Set.new.tap do |result|
    0.upto(size-2) do |i|
      result << str[i, 2]
    end
  end
end

puts bigram('paraparaparadise')
puts bigram('paragraph')

puts bigram('paraparaparadise') + bigram('paragraph')
puts bigram('paraparaparadise') & bigram('paragraph')
puts bigram('paraparaparadise') - bigram('paragraph')

17.rb

require 'pathname'

path = Pathname('hightemp.txt')

path.readlines.map { |line| line.split(/\t/, 2).first }.uniq.display