ruby - 在 Ruby 中的不同数组的特定位置从单个字符创建数组

Question

myArray = ["1324","11455","2234","55345", "1234", "54321"]

如何将其分成 5 个数组，每个数组包含该数组中的 5 个字符之一？

想要的结果是

firstCharacterArray => ["1","1","2","5","1","5"]
...
fifthCharacterArray => ["","5","","5","","1"]

Answer 1

你可以这样做:

def extract_n_character(arr, n)
  arr.map { |c| c[n] || '' }
end

extract_n_character(myArray, 0)
# => ["1", "1", "2", "5", "1", "5"]

extract_n_character(myArray, 4)
# => ["", "5", "", "5", "", "1"]