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rubyrange

Return Range Ruby

def myRange
  this_range = [0..3]
  return this_range
end

puts myRange
puts rand(myRange)

Mac:Postazure$ ruby TESTER.rb
0..3
TESTER.rb:7:in `rand': no implicit conversion of Array into Integer (TypeError)
    from TESTER.rb:7:in `<main>'

This returns a Range of '0..3' but it can't be used as above. Any ideas how I might get that to work?

Solution

  • [0..3] doesn't return a Range. It returns an Array with one Range element.

    2.1.1 :001 > [0..3].class
 => Array

    To return a Range, change the code to

    def myRange
  this_range = 0..3
  return this_range
end

myRange.class
 => Range

    or even better

    def my_range
  0..3
end

    Then you can call

    puts rand(myRange)

    Coding style notes:

    • In Ruby you use implicit return
    • In Ruby naming is underscore_case
    • No need for a variable there