arrays - Ruby 数组和排序问题

Question

如何计算该输入之前和之后的整数数量。

user_array = user_input.chars.to_a

user_array.map {|item| item.to_i}
num = gets.to_i

arrange_array = user_array.push(num).join(",")
#need to give number before, and number after input

Answer 1

puts "Please enter some numbers:"
user_input = gets.chomp

puts "Please enter another number:"
num = gets.to_i

user_input.split('')
          .map(&:to_i)                # convert them to integers
          .partition { |n| n < num }  # split / partition by cond
          .map(&:sort)                # sort results
#⇒ [[0, 1, 2], [4, 5]]

这个解决方案的核心是Enumerable#partition方法，根据提供的条件拆分数组。