解析项目的Clojure地图 - >类别 - 向量分类列表

Question

我有商品名称和向量的映射，vectors存储关键字符串项目所在的类别。我试图将此映射解析为一个耦合的打字员，然后可以通过类别显示它们。

我认为我需要做的是解析地图一次，以制作一组所有可能的类别和子类别。一旦我有的时候，我可以迭代并过滤来自主贴图的所有匹配以获取正确的键字符串。

如何从下面的地图到一组所有主要和子类别？一旦我有那样，如何通过键的值使用它来查询原始地图？

谢谢任何帮助！

(def ITEM-CATEGORIES
 { "thingy"          [["CatergoryA" "SubcategoryA"]]
   "thingy2"         [["FFT"]]
   "thingy3"         [["Generators" "Chaotic"]]
   "thingy4"         [["Analysis" "Pitch"] ["MachineListening"]]
   "thingy5"         [["Multichannel" "Ambisonics"]]
 }

.

在sudo代码中的目标

(generate-hiccup-partial (create-set-of-unique-categories ITEM-CATEGORIES) ITEM-CATEGORIES)
....
(defpartial generate-hiccup-partial
  [categories map]
   ;; hiccup code
   (in-each-sub/main-category-get-keys-by-value categories map))  ;; return a list of all keys with the same categories

.

Answer 1

I do not know what a defpartial is, but this will transform that map:

(defn xform [ic]
  (reduce (fn [result [k [vs]]]
        (reduce (fn [r v]
              (assoc r v (cons k (r v)))))
            result vs))
      {} ic))

user=> (xform ITEM-CATEGORIES)
{"SubcategoryA" ["thingy"], "CatergoryA" ["thingy"], "Ambisonics" ["thingy5"],
 "Multichannel" ["thingy5"], "Pitch" ["thingy4"], "Analysis" ["thingy4"],
 "Chaotic" ["thingy3"], "Generators" ["thingy3"], "FFT" ["thingy2"]}

Answer 2

When I find my self thinking about going up and down nested data structure my mind jumps to the zipper library you could take ITEM-CATECORIES and build a zipper of it then make any number of relations by 'zipping' up and down the tree.