Hi, I'd like to create a simple library of drawable shapes: lines, circles and rectangles. I've placed each type of shape in its own namespace with functions that operate on that shape kind:
(ns myshapes.line) (defn line ... creates new line ...) (defn draw ... draws a line ...) To keep things simple a line is just a vector of two points and circles and rectangles are just structs. I'd also like to have a sequence of shapes called a picture: (ns myshapes.picture) (defn picture ... returns picture sequence from args ...) (defn draw ... draws whole picture) The problem I have is with the myshapes.picture/draw function. As a Clojure newb I keep wanting to think of this like a polymorphic function in the O-O world that relies on each sequence member having a draw function. What's the idiomatic way of handling a situation like this in Clojure? Do I need to use richer data structures than vectors and structs for the shapes so they carry some kind of type information? I can see how a draw multi-method would work if the individual shapes could be distinguished, or am I going about this the wrong way? Any advice much appreciated, Stu -- 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
