如何從數組中的散列中獲取值

Question

我有一個由多個具有相同結構的散列組成的數組。 我還有另一個用字符串填充的數組：

prop_array = [
                {:name=>"item1", :owner=>"block1",:ID=>"11"},
                {:name=>"item2", :owner=>"block2",:ID=>"22"},
                {:name=>"item3", :owner=>"block3",:ID=>"33"},
                {:name=>"item4", :owner=>"block4",:ID=>"44"}
            ]


owner_array = ["block1","block2","block3","block4"]

我想檢查哈希中的任何:owner值是否與owner_array任何字符串owner_array ，並將變量:partID設置為:ID值：

我嘗試了以下但它不起作用：

owner_array.each do |owner|
    prop_array.each do |prop|
        prop.each do |key, value|
            if key[:owner] == owner.to_s
                puts "YES"
                partID = key[:ID]
                puts partID
            end
        end
    end
end

如果正確partID則應返回partID ：

=> "11"
=> "22"
=> "33"
=> "44"

Answer 1

我想檢查哈希中的任何 ':owner' 值是否與 owner_array 中的任何字符串匹配

prop_array.select {|hash| owner_array.include?(hash[:owner]) }
#=> [{:name=>"item1", :owner=>"block1", :ID=>"11"}, {:name=>"item2", :owner=>"block2", :ID=>"22"}, {:name=>"item3", :owner=>"block3", :ID=>"33"}, {:name=>"item4", :owner=>"block4", :ID=>"44"}]

將變量 ":partID" 設置為那個 ':ID' 值

 partID = prop_array.select { |hash| owner_array.include?(hash[:owner]) }
                    .map    { |hash| hash[:ID] }
 #=> ["11", "22", "33", "44"]

編輯

由於您希望在循環中分配這些值，請使用：

partID = prop_array.select { |hash| owner_array.include?(hash[:owner]) }.each do |hash|
  # assignment happens here one by one
  cell_id = hash[:ID] # or whatever logic you have to assign this ID to cell
end