gistfile1.txt

# this one should be optimized in terms of memory usage
def reverse(arr = [])
  reversed = []
  
  # here we remove the element from the original array and write it to the reversed one
  arr.length.times { |i| reversed.push arr.pop }
  
  reversed
end


def reverse(arr = [])
  reversed = []
  arr.each { |el| reversed.prepend(el) }
  reversed
end

def reverse(arr = [])
  reversed = []
  arr.length.times do |i|
    reversed_index = arr.length - (i + 1)
    reversed[reversed_index] = arr[i]
  end
  reversed
end

def reverse(arr = [])
  reversed = []
  i = 1
  arr.each do |el|
    reversed_index = arr.length - i
    reversed[reversed_index] = el
    i += 1
  end
  reversed
end