So I feel compelled at this point to ask..."why?". The whole point of functional programming in Clojure is to de-couple state from data. When you need polymorphic dispatch on the contents of a map, you have access to multi methods. Sure this is a fun thought experiment, but I don't understand the design goals. It's a fairly verbose way to write more complex code to accomplish what we already have good tools for (protocols/multimethods, etc). Maybe I'm missing something.
Timothy On Mon, Nov 23, 2015 at 7:15 PM, William la Forge <laforg...@gmail.com> wrote: > James, when I used the term mixin I was referring to a map that acts like > a trait that gets merged into a larger map. You would define several such > smaller maps that can then be used in various combinations to compose > "objects". The identity of the composite object (this) is the map which > holds the merged contents of the smaller maps. I.E. The entries in the > smaller maps get copied into the larger map. > > When executing functions held by a map, the last parameter is always the > map itself, i.e. the "this". On the other hand, when placing closures into > the map, the self reference is no longer needed as it is implicit in the > closure. But this means that a closure can only reference the contents of > the map when the closure was created, while a function can reference any of > the contents of the map passed as its last argument. > > Why did I make the map reference the last argument for functions held by > the map? So that we can do type polymorphism on the first argument passed > to the function. But we should make an exception to this. To facilitate > threading, functions which return an updated map should take that map as > the first argument. But that is an API change and needs to wait for release > 0.6.0. > > -- > 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. > -- “One of the main causes of the fall of the Roman Empire was that–lacking zero–they had no way to indicate successful termination of their C programs.” (Robert Firth) -- 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.
