Turning long fixed number to array Ruby

Question

Is there a method in ruby to turn fixnum like 74239 into an array like [7,4,2,3,9]?

Answer 1

As of Ruby 2.4, integers (FixNum is gone in 2.4+) have a built-in digits method that extracts them into an array of their digits:

74239.digits
=> [9, 3, 2, 4, 7]

If you want to maintain the order of the digits, just chain reverse:

74239.digits.reverse
=> [7, 4, 2, 3, 9]

Docs: https://ruby-doc.org/core-2.4.0/Integer.html#method-i-digits