Ruby:如何在哈希中找到最大值的键? [英] Ruby: How to find the key of the largest value in a hash?

问题描述

您好，我正在尝试在哈希中找到最大值. 我在Google上进行了搜索，发现了以下代码:

Hello I'm trying to find the largest value in my hash. I made a search in google and I found this code:

def largest_hash_key(hash)
  key = hash.sort{|a,b| a[1] <=> b[1]}.last
  puts key
end

hash = { "n" => 100, "m" => 100, "y" => 300, "d" => 200, "a" => 0 }
largest_hash_key(hash)

在此代码中的

"puts"打印最大的键和值e.x y300. 那么，如何修改代码以找到最大值并将其关键字放入to_s变量中?

in this code "puts" prints the largest key and value e.x y300. So, how I can modify the code in order to find the largest value and put it's key in to_s variable?

推荐答案

这是O(n):

h = {"n" => 100, "m" => 100, "y" => 300, "d" => 200, "a" => 0}
key_with_max_value = h.max_by { |k, v| v }[0] #=> "y"

这篇关于Ruby:如何在哈希中找到最大值的键?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！