Considering that maps do have upsides compared to records in some cases (as indicated, e.g., by Chas's flowchart), and that struct-maps add a couple of handy features in the context of some uses of maps, can anybody say why struct-maps are deprecated?
-Lee On Jul 23, 2012, at 1:07 AM, Takahiro Hozumi wrote: > I think defrecord has 5 downsides compared to regular map. > > 1. The literal of regular map is eye-friendly and portable. > However I still don't know how helpful instant literals added in clojure 1.4 > is for records. > > 2. The construction of record depends on an order of arguments. > Sometimes, I feel that a lack of construction with key-value style is not > convenient. > > 3. Replacing all regular maps to records simply make code volume increase. > > 4. Records easily loose their type. > (merge {:c 3 :d 4} (Foo. 1 2)) > ;=> {:a 1, :b 2, :c 3, :d 4} > > 5. Regular map is a persistent data structure, which has internally efficient > tree data structure, but record is compiled into class with fields as > something like POJO. > I suspect efficiency of record when repeated assoc/dissoc. > > But I could be wrong. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en