class Cursor

# File lib/quantile_estimator/cursor.rb, line 2
def initialize(array, start=0)
  @array = array
  @start = start
end

# File lib/quantile_estimator/cursor.rb, line 17
def next
  Cursor.new(@array, @start + 1)
end

# File lib/quantile_estimator/cursor.rb, line 21
def previous
  Cursor.new(@array, @start - 1)
end

# File lib/quantile_estimator/cursor.rb, line 13
def remove!
  @array.delete_at(@start)
end

# File lib/quantile_estimator/cursor.rb, line 7
def ~
  if @start >= 0
    @array[@start]
  end
end