Reverse Ruby Methods

reverse-ruby.rb

#Simple programming challenge in Ruby

#1) Reverse a string and array without using the ruby method 'reverse'

#2) Reverse a string and array recursively 


#reverse string
def reverse(s)
  i = 0
  out = ""
  out << s[i -= 1] until i == -s.length
  out
end

def recurse_reverse(s)
  return s[0] if s.length == 1
  s[-1] << recurse_reverse(s[0..-2])
end

#reverse array
def reverse(a)
  i = 0
  out = []
  out << a[i -= 1] until i == -a.length
  out
end

def recurse_reverse(a)
  return [a[0]] if a.length == 1
  a[-1]].concat recurse_reverse(a[0..-2])
end