Ruby - 循环遍历一个数组，删除该数组的结束元素和 append 到另一个数组

Question

I am attempting the following coding challenge.

Write a program to loop through the array named food and remove the end element of that array, and append it to the array named drink . The initial values of these arrays are:

food = ["Tempura", "Prawn", "Squid", "Fish", "Chips"]
drink = ["Kombucha", "Coconut Mango", "Allberry", "Yogurt Rice", "Milk bubble tea"]

I know how to get the last element from the first array and append it to the second array.

print drink << food.slice(-1)

I struggle with finding the loop so that I can get the following out.

food_&_drink = ["Kombucha", "Coconut Mango", "Allberry", "Yogurt Rice", "Milk bubble tea", "Chips", "Fish", "Squid", "Prawn", "Tempura"]

How to match element 1 from the food array to element 4 in the drink array. With the method that I know, I am not getting the output the want:

print food.flatten.zip(drink)

Answer 1

The simplest/clearest solution to reach your desired output (nondestructively):

drink + food.reverse

The solution matching your wording:

until food.empty?
  drink << food.pop
end

or even

drink << food.pop until food.empty?