# File lib/facet/floatstring.rb, line 131
  def fill(val, rng=0..-1)
    a = @float.to_a.sort_by{ |k,v| k }
    s = a.index( a.find{ |e| e[0] == rng.first.to_f } )
    f = a.index( a.find{ |e| e[0] == rng.last.to_f } )
    x = (rng.exclude_end? ? a[s...f] : a[s..f])
    x.each{ |k,v| @float[k] = val.to_s }
    self.to_s
  end