Powers Of 2 Range Assignment

Reference

Ruby

yield

block_given?

to_enum

Code to Implement

PowersOfTwoRange

file:	src/main/ruby/powers_of_two_range/powers_of_two_range.rb
class:	PowersOfTwoRange
superclass:	Object
methods:	initialize(maximum, inclusive: false) each each_with_index

initialize(maximum, inclusive: false)

hang onto enough information in instance variables to support each and each_with_index

each

if a block is given, repeatedly yield with appropriate value.

otherwise, return an enum via to_enum.

exclusive client with block given

exclusive_powers_of_two = PowersOfTwoRange.new(64)
exclusive_powers_of_two.each do |n|
  puts n
end

outputs

1
2
4
8
16
32

inclusive client with block given

exclusive_powers_of_two = PowersOfTwoRange.new(64, inclusive: true)
exclusive_powers_of_two.each do |n|
  puts n
end

outputs

1
2
4
8
16
32
64

exclusive client without block

exclusive_powers_of_two = PowersOfTwoRange.new(64)
as_enum = exclusive_powers_of_two.each
p as_enum.to_a

outputs

[1, 2, 4, 8, 16, 32]

each_with_index

if a block is given, repeatedly yield with appropriate value and its index.

otherwise, return an enum via to_enum.

Unit Test

file:

src/test/ruby/powers_of_two_range/powers_of_two_range.rb

UnitTest

note: ensure that you have removed all printing to receive credit for any assignment.