选择排序混乱

Question

我在ruby中做一个简单的选择排序，但我按降序排序。这让我很困惑，因为这对我所有的数据都适用，除了一个数字。

def parallel_sort(data, labels)
    raise "unequal array lengths" if  data.length != labels.length
    temp = File.open("temp.txt", "w")
    0.upto(data.length - 2) do |i|
        max = i # largest value
        (i+1).upto(data.length - 1) { |j| max = j if data[j] > data[max] } 
        data[i], data[max], labels[i], labels[max] = data[max], data[i], labels[max], labels[i] if i != max 
        temp.puts "->", data, "n", labels, "n"
    end
    return [data, labels]
end

未排序数据:

- ->26.71% 0.17% 0.65% 0.36% 0.17% 2.79% 0.04% 18.03% 0.13% 25.7% 25.18% 0.36%

迭代:

- ->26.71% 25.7% 0.65% 0.36% 0.17% 2.79% 0.04% 18.03% 0.13%0.17% 25.18% 0.36%

- ->25.18% 26.71% 25.7% 0.36% 0.17% 2.79% 0.04% 18.03% 0.13% 0.17% 0.65% 0.36%

18.03%在这里被跳过:

- ->2.79% 26.71% 25.7% 25.18% 0.17% 0.36% 0.04% 18.03% 0.13% 0.17% 0.65% 0.36%

- ->18.03% 26.71% 25.7% 25.18% 2.79% 0.36% 0.04% 0.17% 0.13% 0.17% 0.65% 0.36%

- ->0.65% 26.71% 25.7% 25.18% 2.79% 18.03% 0.04% 0.17% 0.13% 0.17% 0.36% 0.36%

- ->0.36% 26.71% 25.7% 25.18% 2.79% 18.03% 0.65% 0.17% 0.13% 0.17% 0.04% 0.36%

- ->0.36% 26.71% 25.7% 25.18% 2.79% 18.03% 0.65% 0.36% 0.13% 0.17% 0.04% 0.17%

- ->0.17% 26.71% 25.7% 25.18% 2.79% 18.03% 0.65% 0.36% 0.36% 0.13% 0.04% 0.17%

- ->0.17% 26.71% 25.7% 25.18% 2.79% 18.03% 0.65% 0.36% 0.36% 0.17% 0.04% 0.13% 的

- ->0.13% 26.71% 25.7% 25.18% 2.79% 18.03% 0.65% 0.36% 0.36% 0.17% 0.17% " 0.04%

我不明白为什么2.79%被算作> 18.03%

任何帮助将是伟大的，谢谢!

Answer 1

看起来你是按字母顺序排序的，所以我敢打赌你排序的数据是字符串，当你想要他们是浮点数