0

所以我有一个哈希问题......我认为：

我有两个要比较的哈希值。在我的代码中的某个时刻，我得到了一个响应，例如..

@moves = {:wm01 => {:a1=>"O", :a2=>" ", :a3=>" ", :b1=>" ", :b2=>"O", :b3=>" ", :c1=>" ", :c2=>" ", :c3=>" "}

这对应于一个答案键哈希......

@anskey = {
    :wm01=>":c3",:wm02=>":c2",:wm03=>":c1",:wm04=>":b3",:wm05=>":b1",:wm06=>":a3",:wm07=>":a2",:wm08=>":a1",
    :wm09=>":a3",:wm10=>":c1",:wm11=>":a1",:wm12=>":c3",:wm13=>":c3",:wm14=>":c1",:wm15=>":c3",:wm16=>":a1",
    :wm17=>":b1",:wm18=>":b2",:wm19=>":b3",:wm20=>":a2",:wm21=>":b2",:wm22=>":b2",:wm23=>":c2",:wm24=>":b2"
  }

在这种情况下，我需要迭代 @anskey where @moves.keys == @anskey.keys

（看起来很简单，但似乎不起作用）

然后设置....

my_answer_is = @anskey.value

所以是这样的？？？

@anskey.each do |key. value|
  if @moves.keys == key
     my_answer_is = @value
  end
end

下面的违规代码

class Player

  attr_reader :boardpiece

  def initialize(letter)
    @boardpiece = letter
  end

  def move_human(game)
    puts "human move..."
    @move = gets.chomp
  end

  def move_computer(game)
    puts "computer move..."

    # all possible third moves as 'O' (computer)
    @ai_winmoves = {
        :wm01 => {:a1=>"O", :a2=>" ", :a3=>" ", :b1=>" ", :b2=>"O", :b3=>" ", :c1=>" ", :c2=>" ", :c3=>" "},
        :wm02 => {:a1=>" ", :a2=>"O", :a3=>" ", :b1=>" ", :b2=>"O", :b3=>" ", :c1=>" ", :c2=>" ", :c3=>" "},
        :wm03 => {:a1=>" ", :a2=>" ", :a3=>"O", :b1=>" ", :b2=>"O", :b3=>" ", :c1=>" ", :c2=>" ", :c3=>" "},
        :wm04 => {:a1=>" ", :a2=>" ", :a3=>" ", :b1=>"O", :b2=>"O", :b3=>" ", :c1=>" ", :c2=>" ", :c3=>" "},
        :wm05 => {:a1=>" ", :a2=>" ", :a3=>" ", :b1=>" ", :b2=>"O", :b3=>"O", :c1=>" ", :c2=>" ", :c3=>" "},
        :wm06 => {:a1=>" ", :a2=>" ", :a3=>" ", :b1=>" ", :b2=>"O", :b3=>" ", :c1=>"O", :c2=>" ", :c3=>" "},
        :wm07 => {:a1=>" ", :a2=>" ", :a3=>" ", :b1=>" ", :b2=>"O", :b3=>" ", :c1=>" ", :c2=>"O", :c3=>" "},
        :wm08 => {:a1=>" ", :a2=>" ", :a3=>" ", :b1=>" ", :b2=>"O", :b3=>" ", :c1=>" ", :c2=>" ", :c3=>"O"},
        #check those corners
        :wm09 => {:a1=>"O", :a2=>"O", :a3=>" ", :b1=>" ", :b2=>" ", :b3=>" ", :c1=>" ", :c2=>" ", :c3=>" "},
        :wm10 => {:a1=>"O", :a2=>" ", :a3=>" ", :b1=>"O", :b2=>" ", :b3=>" ", :c1=>" ", :c2=>" ", :c3=>" "},
        :wm11 => {:a1=>" ", :a2=>"O", :a3=>"O", :b1=>" ", :b2=>" ", :b3=>" ", :c1=>" ", :c2=>" ", :c3=>" "},
        :wm12 => {:a1=>" ", :a2=>" ", :a3=>"O", :b1=>" ", :b2=>" ", :b3=>"O", :c1=>" ", :c2=>" ", :c3=>" "},
        :wm13 => {:a1=>" ", :a2=>" ", :a3=>" ", :b1=>" ", :b2=>" ", :b3=>"O", :c1=>" ", :c2=>" ", :c3=>"O"},
        :wm14 => {:a1=>" ", :a2=>" ", :a3=>" ", :b1=>" ", :b2=>" ", :b3=>" ", :c1=>" ", :c2=>"O", :c3=>"O"},
        :wm15 => {:a1=>" ", :a2=>" ", :a3=>" ", :b1=>" ", :b2=>" ", :b3=>" ", :c1=>"O", :c2=>"O", :c3=>" "},
        :wm16 => {:a1=>" ", :a2=>" ", :a3=>" ", :b1=>"O", :b2=>" ", :b3=>" ", :c1=>"O", :c2=>" ", :c3=>" "},
        #check opposites
        :wm17 => {:a1=>"O", :a2=>" ", :a3=>" ", :b1=>" ", :b2=>" ", :b3=>" ", :c1=>"O", :c2=>" ", :c3=>" "},
        :wm18 => {:a1=>" ", :a2=>"O", :a3=>" ", :b1=>" ", :b2=>" ", :b3=>" ", :c1=>" ", :c2=>"O", :c3=>" "},
        :wm19 => {:a1=>" ", :a2=>" ", :a3=>"O", :b1=>" ", :b2=>" ", :b3=>" ", :c1=>" ", :c2=>" ", :c3=>"O"},
        :wm20 => {:a1=>"O", :a2=>" ", :a3=>"O", :b1=>" ", :b2=>" ", :b3=>" ", :c1=>" ", :c2=>" ", :c3=>" "},
        :wm21 => {:a1=>" ", :a2=>" ", :a3=>" ", :b1=>"O", :b2=>" ", :b3=>"O", :c1=>" ", :c2=>" ", :c3=>" "},
        :wm22 => {:a1=>"O", :a2=>" ", :a3=>" ", :b1=>" ", :b2=>" ", :b3=>" ", :c1=>" ", :c2=>" ", :c3=>"O"},
        :wm23 => {:a1=>" ", :a2=>" ", :a3=>" ", :b1=>" ", :b2=>" ", :b3=>" ", :c1=>"O", :c2=>" ", :c3=>"O"},
        :wm24 => {:a1=>" ", :a2=>" ", :a3=>"O", :b1=>" ", :b2=>" ", :b3=>" ", :c1=>"O", :c2=>" ", :c3=>" "}
      }
    # match current answers located in @thegrid with possible @anskey array, iterate for each item
    @anskey={
        :wm01=>":c3",:wm02=>":c2",:wm03=>":c1",:wm04=>":b3",:wm05=>":b1",:wm06=>":a3",:wm07=>":a2",:wm08=>":a1",
        :wm09=>":a3",:wm10=>":c1",:wm11=>":a1",:wm12=>":c3",:wm13=>":c3",:wm14=>":c1",:wm15=>":c3",:wm16=>":a1",
        :wm17=>":b1",:wm18=>":b2",:wm19=>":b3",:wm20=>":a2",:wm21=>":b2",:wm22=>":b2",:wm23=>":c2",:wm24=>":b2"
      }
    #
    # scan board for available move locations

    # select all values where value is X for thegrid and copy those into keys_with_x

    # compare result to ai_winmoves
    keys_with_o = $thegrid.select{ |k, v| v == "O" }.keys
    matching_moves = @ai_winmoves.select{ |k, v| v.select{ |k, v| v == "O" }.keys == keys_with_o }
    # if matching_moves.keys contains anything with wm print results
    test_str = matching_moves.keys.to_s
    win_key  = matching_moves.keys
    # str = [:wm21]
    puts "keys with o:"
    puts keys_with_o
    puts "matching:"
    puts win_key

THIS IS THE AREA THAT BOTHERS ME

    if test_str =~ /wm/ #match found then...
      puts "WIN DETECTED" #TODO - which player won?
      puts win_key
      puts test_str
      # which answer is it?
      @anskey.each do |key, value|
        if matching_moves.keys == key
          puts "answer:"
          @move = @anskey[value]
          puts @move
          exit
        else
          puts "error in if else loop"
        end
      end
    else

END AREA THAT BOTHERS ME

      # scan board for available moves... 
      available_moves = $thegrid.select{ |k, v| v == " " }.keys
      # then make a random move
      puts "availble:"
      puts available_moves
      @move = available_moves[rand(available_moves.length)]
      # @move = "b2"
    end
  end
end
4

2 回答 2

5

字符串不是符号。

您的其中一个哈希具有类似 的字符串":c3"，不等于:c3*。

您可以使用 将字符串转换为符号.to_sym，或使用 将符号转换为字符串.to_s。

正如 Max 所说，没有（好的？）理由来存储字符串而不是符号。如果您可以更改代码，请将符号用作值和键，并完全跳过转换。这是首选，IMO。

* 除非您在 Rails 中或使用与HashWithIndifferentAccess.

于 2012-08-17T23:26:44.650 回答
0

当你说@moves.keys你得到一个包含所有键的数组时@moves。

在该行if @moves.keys == key中，您尝试将单元素数组[:wm01]与 symbol进行比较:wm01，但它们永远不会相等，因为它们是不同的类型。

如果您知道@moves此时代码中只有一个键，您可以通过@moves.keys.first. 然后使用该键索引@anskey而不是循环遍历它：

@anskey[@moves.keys.first]

您不应该循环检查所有键是否相等的哈希。哈希的意义在于hash[key]语法为您提供了值，key而无需任何循环。

于 2012-08-18T00:55:39.133 回答