James, The advantages of one style over another are often subtle. And indeed, a single object written this way has no real advantage. Poor choice, but it was the only code I have written in this way so far. The addition of closures only occurred to me while writing this piece of code.
I included the file-channel in the map more on principle than anything else. Opinionated Clojure does not try to encapsulate the way Java does, or such has been my impression anyway. I do sometimes encapsulate when I want the API to be clearer, but otherwise not. The reason for having this "type of object" at all is that I was going to have 3 copies of the same code. Which I find to be a bad thing. One thing I left out was that in aatree.core I have functions which call the "object methods". These functions are implemented like this: (defn do-something [arg1 arg2 opts] ((:do-something opts) arg1 arg2)) This gives me a lot of decoupling. opts then is the "object" map. But it can be a munged together map of lots of key/value pairs from a lot of different "types of objects". Composition goes something like this in its simplest form: (opts -> (db-file-open) (db-cache-open) etc) I end up composing a lot of things richly but with simplicity. Being new to Clojure, I am fascinated by all this. And as I add more and more capabilities, it looks like everything stays quite stable--which is exactly the opposite of my experience in working with Java objects. Bill -- 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 --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
