class FakeRedis::ZSet

def []=(key, val) 

def []=(key, val)
  super(key, _floatify(val))
end

def _floatify(str, increment = true)

Originally lifted from redis-rb 
def _floatify(str, increment = true)
  if (( inf = str.to_s.match(/^([+-])?inf/i) ))
    (inf[1] == "-" ? -1.0 : 1.0) / 0.0
  elsif (( number = str.to_s.match(/^\((-?\d+)/i) ))
    number[1].to_i + (increment ? 1 : -1)
  else
    Float str.to_s
  end
rescue ArgumentError
  raise Redis::CommandError, "ERR value is not a valid float"
end

def identical_scores? 

def identical_scores?
  values.uniq.size == 1
end

def increment(key, val)

Increments the value of key by val 
def increment(key, val)
  self[key] += _floatify(val)
end

def select_by_score min, max 

def select_by_score min, max
  min = _floatify(min, true)
  max = _floatify(max, false)
  select {|_,v| v >= min && v <= max }
end