Question

Currently it outputs the reverse string using this code:

string = 'Hello World!'
my_reverse = String.new
i = 1; while i <= string.length
  my_reverse << string[-i]
  i+=1
end

puts my_reverse

But I want to write a method, my_reverse, which takes a string as an argument and returns the reversed string. Like so:

my_reverse("hello")
#=> "olleh"

Answer 1

Just wrap the code you already have in a method:

def my_reverse(string_to_reverse)

   reverse_string = String.new
   i = 1; while i <= string_to_reverse.length
     reverse_string << string_to_reverse[-i]
     i+=1
   end

   return reverse_string 

end

and then call it like so:

>> my_reverse("Hello World")

You should note that a method already exists to do this: string.reverse. Even then, this particular implementation of reverse isn’t the best.