最近雙十一，公司趕上線新功能，忙瘋了，終于忙里偷閑擼一下ruby代碼，新手入坑，勿噴！

新源代碼：(多重賦值節(jié)省代碼)

$array = [21, 35, 33, 41, 16, 6]

def select_rank(arr)
  arr.each_with_index do |item, index|
    init_index = index
    inner_arr = arr[index + 1, arr.length - index]
    inner_arr.each_with_index do |i, idx|
      min_num = item
      min_index = init_index
      if min_num > i
        min_index = idx + index + 1
        min_num = arr[min_index]
      end
      arr[init_index], arr[min_index] = arr[min_index], arr[init_index]
    end
  end
end

原源代碼：

$array = [21, 35, 33, 41, 16, 6]

def select_rank(arr)
  arr.each_with_index do |item, index|
    init_index = index
    inner_arr = arr[index+1, arr.length - index]
    inner_arr.each_with_index do |i, idx|
      min_num = item
      min_index = init_index
      if min_num > i
        min_index = idx + index + 1
        min_num = arr[min_index]
      end
      select_change_position($array, init_index, min_index)
    end
  end
end
def select_change_position (arr, init_index, min_index)
  arr_store = arr[init_index]
  arr[init_index] = arr[min_index]
  arr[min_index] = arr_store
end

p "原始數(shù)組",$array
select_rank($array)
p "排序后數(shù)組",$array

結(jié)果：

"原始數(shù)組"
[21, 35, 33, 41, 16, 6]
"排序后數(shù)組"
[6, 16, 21, 33, 35, 41]

總結(jié)：

• 使用到的知識包括：循環(huán)語句、全局變量、局部變量、函數(shù)定義方法、打印功能、if判斷語句、數(shù)組的相關(guān)方法等；
• 實(shí)現(xiàn)方式相對簡單，有待打磨代碼。