如何从数组中的散列中获取值

Question

我有一个由多个具有相同结构的散列组成的数组。 我还有另一个用字符串填充的数组：

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"]

我想检查哈希中的任何:owner值是否与owner_array任何字符串owner_array ，并将变量:partID设置为:ID值：

我尝试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

如果正确partID则应返回partID ：

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

Answer 1

我想检查哈希中的任何 ':owner' 值是否与 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"}]

将变量 ":partID" 设置为那个 ':ID' 值

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

编辑

由于您希望在循环中分配这些值，请使用：

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