Ruby数组一次访问2个连续（链接）元素

Question

现在，这是阵列，[1,2,3,4,5,6,7,8,9]我想要，[1,2],[2,3],[3,4] upto [8,9]当我这样做时，每个我都得到了（2），[[1,2],[3,4]..[8,9]]我目前这样做，arr.each_with_index do |i,j|  p [i,arr[j+1]].compact #During your arr.size is a odd number, remove nil.end有没有更好的办法？？

Answer 1

你几乎做对了:)

arr = [1,2,3,4,5,6,7,8,9]

arr.each_cons(2) do |chunk|

  p chunk

end

# >> [1, 2]

# >> [2, 3]

# >> [3, 4]

# >> [4, 5]

# >> [5, 6]

# >> [6, 7]

# >> [7, 8]

# >> [8, 9]