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。我还有另一个充满字符串的数组：

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"]

我想检查散列中的任何 :owner 值是否与 owner_array 中的任何字符串匹配，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

如果运行正确 partID 应该返回：

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

Answer 1

I want to check if the any of the ':owner' value in the hash matches with any of the strings in owner_array

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"}]

set the variable ":partID" to that ':ID' value

 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

如何从数组中的散列中获取值

How to get values from a hash within an array

ruby

arrays

hash

jruby

编辑