Create a ring of successive doubles

doubles  start (number), num_doubles (int)

Create a ring containing the results of successive doubling of the start value. If num_doubles is negative, will return a ring of halves.

Introduced in v2.10

Examples

# Example 1

(doubles 60, 2)

#=> (ring 60, 120)

# Example 2

(doubles 1.5, 3)

#=> (ring 1.5, 3, 6)

# Example 3

(doubles 1.5, 5)

#=> (ring 1.5, 3, 6, 12, 24)

# Example 4

(doubles 100, -4)

#=> (ring 100, 50, 25, 12.5)