sharksforcheap

def median(array)
  leng=array.length
  case leng
  when leng%2==0
    i=leng/2
    med=(array[i-1].to_f + array[i].to_f) / 2
    return med
  else
    med=array[(leng/2)]
    return med

sharksforcheap

class Position
  attr_reader :x, :y
  @cache_of_positions = {}

  def self.new_with_memo(x,y)
    @cache_of_positions[[x,y]] || Position.new(x,y).tap do |instance| 
      @cache_of_positions[[x,y]] = instance
    end
  end

sharksforcheap

require 'logger'

ActiveRecord::Base.logger = Logger.new(STDOUT)

sharksforcheap

class SudokuBoard

  def initialize(board_str)
    @board = board_str.split("").map { |value| Cell.new(value.to_i) }
    @groups = []
    (generate_rows + generate_cols + generate_grids).each do |group_member_indices_ar|
      group_cell_members = group_member_indices_ar.map { |index| @board[index] }
      @groups << Group.new(group_cell_members)
    end
    puts to_s

sharksforcheap

class Integer
  def in_words
    if self < 20
      {0 => "\b", 1 => "one", 2 => "two", 3 => "three", 4 => "four", 5 => "five", 6 => "six", 7 => "seven", 8 => "eight", 9 => "nine", 10 => "ten", 11 => "eleven", 12 => "twelve", 13 => "thirteen", 14 => "fourteen", 15 => "fifteen", 16 => "sixteen", 17 => "seventeen", 18 => "eighteen", 19 => "nineteen"}[self]
    elsif self < 100
      "#{{20 => "twenty", 30 => "thirty", 40 => "forty", 50 => "fifty", 60 => "sixty", 70 => "seventy", 80 => "eighty", 90 => "ninety"}[self - (self % 10)]} #{(self % 10).in_words}"
    elsif self < 1_000
      "#{(self / 100).in_words} hundred #{(self % 100).in_words}"
    else
      {10 ** 12 => "trillion", 10 ** 9 => "billion", 10 ** 6 => "million", 10 ** 3 => "thousand"}.each do |number, word|