Question

我想知道是否有办法搜索哈希表以获取包含值的键和值。

目前我正在这样做：

 #for this example say 
 bot,input = "rock","scissors" 

hash = Hash['rock', 'scissors', 'scissors', 'paper', 'paper', 'rock'] 
outcome = ([hash.rassoc(bot), hash.assoc(bot)] &  [hash.rassoc(input),hash.assoc(input)]).flatten

结果在这里查找包含机器人和输入的所有哈希元素;然后检查他们有哪个共同点。只是想知道是否有一种方法我想要返回我想要的东西：

outcome = [hash.rassoc(bot), hash.assoc(bot)]

Answer 1

这是你在找什么？

winners = { "rock"=>"scissors", "scissors"=>"paper", "paper"=>"rock" } 

def outcome(winners, player, opponent)
  return :win  if winners.any? { |pair| pair == [player, opponent] }
  return :lose if winners.any? { |pair| pair == [opponent, player] }
  return :tie
end

outcome winners, "rock", "scissors" #=> :win
outcome winners, "scissors", "rock" #=> :lose
outcome winners, "rock", "rock"     #=> :tie

如果'key'或'value'包含ruby中的值，则选择hash元素

1 个答案: