No, it’s intentionally not possible. There was a conversation on the ClojureScript mailing list recently related to :refer :all and it looks like it will never be supported. To quote David Nolen from that thread: It’s just bad style and as far I know the only reason it hasn’t changed in Clojure is because the … Read more
You could wrap your predicate with the is macro from clojure.test (defn string-to-string [s1] {:pre [(is (string? s1))] :post [(is (string? %))]} s1) Then you get: (string-to-string 10) ;FAIL in clojure.lang.PersistentList$EmptyList@1 (scratch.clj:5) ;expected: (string? s1) ;actual: (not (string? 10))
Try some thing like (set! (.-property foo) 5)
As I understand it: Application state is the “global” state that all components in the component tree can access, through cursors. This is the state that your application is in and basically what is being rendered by Om. So, for example, if you are writing a chat program, the application state would contain a list … Read more
deftype creates a bare-bones object which implements a protocol. defrecord creates an immutable persistent map which implements a protocol. Which to use depends on what you want. Do you want a full ClojureScript data structure? Then use a record. Do you just want a bare-bones thing that does nothing but satisfy a protocol? Then use … Read more
Fogus is writing a series on ClojureScript which you may find interesting. Compiling Clojure to Javascript Jul 21, 2011 Compiling Clojure to JavaScript, pt. 2 – Why No Eval? Jul 29, 2011 Compiling Clojure to JavaScript, pt. 3 – The Himera Model Mar 27, 2012 The ClojureScript Compilation Pipeline Apr 25, 2012
Both force you to use a more declarative/functional programming style than pure JS. ClojureScript is more like a JS replacement, whereas Elm is more like a replacement for the entire web development stack (HTML/CSS/JS). Other differences: Elm syntax is much more Haskell-like ClojureScript is much closer to traditional Lisp syntax Elm is highly optimized for … Read more
You have to add the :private true metadata key value pair. (def ^{:private true} some-var :value) ;; or (def ^:private some-var :value) The second form is just a short-hand for the first one.