takahashilabo

#!/bin/bash
while read -s -n 1 char
do
  echo $char
done < $1 | sort | uniq | wc -l | awk '{print $1}'

takahashilabo

class String
  def count_the_number_of_words_in_a_string(word, pos = 0, num = 0)
    pos = self.index(word, pos)
    return num if pos == nil 
    count_the_number_of_words_in_a_string(word, pos + 1, num + 1)
  end 
end 

takahashilabo

class String
  def count_the_number_of_words_in_a_string(word)
    return self.split(/#{word}/).size - 1 
  end 
end 

takahashilabo

#長さ制限つきのQueue

class Q

  attr_accessor :q

  def initialize(size)
    @q = []
    @size = size
  end