Ruby Golf for IPRUG

golf.rb

class Golf
  class << self
    def hole1(r)
      r.inject 1,:*
    end
    def hole2(s)
      s.split.sort_by{|a| a[1]}.join " "
    end
    def hole3(n)
      (1..n).inject 1,:*
    end
    def hole4(a)
      a.map{|b| b.sub(/man\((.*)\)/,'hat(man(\1))').sub(/dog\((.*)\)/,'dog(\1(bone))').sub(/cat/,'dead') }
    end
    def hole5(a)
      (1..a[-1]).map{|b| a.each_cons(b).to_a}.flatten 1
    end
    def hole6(t)
      (1..t).map{|a| a%3==0 && a%5==0 ? 'fizzbuzz': a%3==0 ? 'fizz' : a%5 == 0 ? 'buzz' : a}
    end
    def hole7(t)
      r = []
      b,c = t[0],t[0]
      i=0
      t.each{|a| a - t[i-1] > 1 ?( c = t[i-1]; (b == c ? r << "#{b}" : r << "#{b}-#{c}"); b=a) : c=a; i+=1}
      r << "#{b}-#{c}"
    end
    def hole8(u)
      a = [1,1]
      (2..u-1).each{|i| a << a[i-1]+ a[i-2]}
      a
    end    
  end
end