reverse_array.rb

def reverse_array(arr)
	temp = []
	lastIndex = arr.length - 1
	
	arr.length.times do
		temp << arr[lastIndex]
		lastIndex -= 1
	end
	
	return temp
end

reverse_array_with_recursion.rb

def reverse_array_with_recursion(arr, first_index, last_index)
	return arr if first_index > last_index 
  
	temp = arr[first_index]
	arr[first_index] = arr[last_index]
	arr[last_index] = temp

	return reverse_array_with_recursion(arr, first_index + 1, last_index - 1)
end