Remove helper for shouldComponentUpdate

src/reagent/impl/component.cljs

@@ -29,8 +29,9 @@
 (defn set-state [this new-state]
   (swap! (state-atom this) merge new-state))
 
-;; set from template, to avoid circular deps
+;; ugly circular dependency
-(def as-element nil)
+(defn as-element [x]
+  (reagent.impl.template/as-element x))
 
 ;;; Rendering
 
@@ -92,7 +93,9 @@
                    (let [old-argv (.' c :props.argv)
                          new-argv (.' nextprops :argv)]
                      (if (nil? f)
-                       (not (util/equal-args old-argv new-argv))
+                       (or (nil? old-argv)
+                           (nil? new-argv)
+                           (not= old-argv new-argv))
                        (f c old-argv new-argv))))))
 
     :componentWillUpdate

src/reagent/impl/template.cljs

@@ -230,9 +230,6 @@
                    (expand-seq x))
         true x))
 
-;; Cheat, to avoid ugly circular dependency
-(set! reagent.impl.component/as-element as-element)
-
 (defn expand-seq [s]
   (let [a (into-array s)]
     (dotimes [i (alength a)]

src/reagent/impl/util.cljs

@@ -207,8 +207,3 @@
             (partial-ifn. callback-fn args nil)
             false))
 
-
-;;; Helpers for shouldComponentUpdate
-
-(defn equal-args [v1 v2]
-  (= v1 v2))