Powers Of 2 Range Assignment
Reference
Ruby
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.
exclusive client with block given
exclusive_powers_of_two = PowersOfTwoRange.new(64) exclusive_powers_of_two.each_with_index do |n, index| puts "#{n}, #{index}" end
outputs
1, 0 2, 1 4, 2 8, 3 16, 4 32, 5
Client
Unit Test
file: | src/test/ruby/powers_of_two_range/powers_of_two_range.rb | ![]() |
note: ensure that you have removed all printing to receive credit for any assignment.