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Message from discussion Transforming an ugly nested loop into clojure code
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gaz jones  
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 More options Oct 1 2012, 6:22 pm
From: gaz jones <gareth.e.jo...@gmail.com>
Date: Mon, 1 Oct 2012 17:22:18 -0500
Local: Mon, Oct 1 2012 6:22 pm
Subject: Re: Transforming an ugly nested loop into clojure code
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You appear to be running over the map purely for side-effects,
therefore off the top of my head something like:

(defn my-func
  [data]
  (doseq [area data
          warehouse (:warehouses area)
          container (:containers warehouse)
          box (:boxes container)]
    (if-not (empty? (:items box))
      (doseq [item (:items box)] (do-something (:box box) (:item item)))
      (do-something-else (:warehouse warehouse)
                         (:container container)
                         (:box box)))))

Might be more appropriate...

On Mon, Oct 1, 2012 at 5:07 PM, arekanderu <arekand...@gmail.com> wrote:
>> (def my-data [{:area "Somewhere" :warehouses

>>                [{:warehouse "W54321" :containers

>>                 [{:container "C12345" :boxes

>>                   [{:box "B12345" :items

>>                     [{:item "I12345"}]}]}]}]}

>>               {:area "SomewhereElse" :warehouses

>>                [{:warehouse "W54321" :containers

>>                 [{:container "C54321" :boxes

>>                   [{:box "B54321" :items

>>                     [{:item "I54321"}]}]}]}]}])

>> (defn my-func [data]

>>   (map (fn [area]

>>          (map (fn [warehouse]

>>                 (map (fn [container]

>>                        (map (fn [box]

>>                               (if (not (empty? (:items box)))

>>                                 (map (fn [item]

>>                                        (doSomething (:box box) (:item
>> item)))

>>                                      (:items box))

>>                                 (doSomethingElse (:warehouse warehouse)
>> (:container container) (:box box))))

>>                               (:boxes container)))

>>                      (:containers warehouse)))

>>               (:warehouses area)))

>>        data))


 
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