fizz buzz

fizz_buzz.rb

# Fizz buzz
# Range 1 -> 100 (inclusive)
# If divisible by 3, output fizz 
# If divisible by 5, output buzz 
# If divisible by 3 and 5, output fizzbuzz

FIZZ = 'fizz'.freeze
BUZZ = 'buzz'.freeze
FIZZBUZZ = (FIZZ + BUZZ).freeze

def divisible_by?(dividend, *divisor)
  return false if divisor.nil? || divisor.count == 0
  
  divisor.all? { |divisor| dividend % divisor == 0 }
end

(1..100).each do |dividend|
  puts case
  when divisible_by?(dividend, 3, 5)
    FIZZBUZZ
  when divisible_by?(dividend, 3)
    FIZZ
  when divisible_by?(dividend, 5)
    BUZZ
  else
    dividend
  end
end

fizz_buzz2.rb

# Fizz buzz
# Range 1 -> 100 (inclusive)
# If divisible by 3, output fizz 
# If divisible by 5, output buzz 
# If divisible by 3 and 5, output fizzbuzz

def multiple_of_3_or_5?(number)
  multiple_of_3?(number) && multiple_of_5?(number)
end

def multiple_of_3?(number)
  number % 3 == 0
end

def multiple_of_5?(number)
  number % 5 == 0
end

def word_for(number)
  if multiple_of_3_or_5?(number)
    'FizzBuzz'
  elsif multiple_of_3?(number)
    'Fizz'
  elsif multiple_of_5?(number)
    'Buzz'
  else
    number
  end
end

(1..100).each_with_index do |number, index|
  puts "#{(index + 1).to_s.rjust(3, ' ')}: #{word_for(number)}"
end