Intro to Ruby - 13 - Files

01_reading_file.rb

def get_result(number)
  if(number % 3 == 0 && number % 5 == 0)
    return "FizzBuzz"
  elsif(number % 3 == 0)
    return "Fizz"
  elsif(number % 5 == 0)
    return "Buzz"
  else
    return number.to_s
  end
end

File.open('random.txt', 'r').each do |line|
  puts get_result(line.to_i)
end

02_writing_to_file.rb

def get_result(number)
  if(number % 3 == 0 && number % 5 == 0)
    return "FizzBuzz"
  elsif(number % 3 == 0)
    return "Fizz"
  elsif(number % 5 == 0)
    return "Buzz"
  else
    return number.to_s
  end
end

File.open('results.txt', 'w') do |result_file|
  File.open('random.txt', 'r').each do |line|
    result_file.puts get_result(line.to_i)
  end
end

random.txt

25723
18559
7519
3255
32069
10452
14661
27479
21307
1460
22465
13023
4422
15020
6033
8803
3792
15330
6910
29472
29766
26340
5813
13347
11087

results.txt

25723
18559
7519
FizzBuzz
32069
Fizz
Fizz
27479
21307
Buzz
Buzz
Fizz
Fizz
Buzz
Fizz
8803
Fizz
FizzBuzz
Buzz
Fizz
Fizz
FizzBuzz
5813
Fizz
11087