refactor($compile): reuse shared simpleCompare method

Author: jbedard

Diff for: src/.eslintrc.json

@@ -69,6 +69,7 @@
     "arrayRemove": false,
     "copy": false,
     "shallowCopy": false,
+    "simpleCompare": false,
     "equals": false,
     "csp": false,
     "concat": false,

Diff for: src/Angular.js

@@ -62,6 +62,7 @@
   includes,
   arrayRemove,
   copy,
+  simpleCompare,
   equals,
   csp,
   jq,
@@ -1024,6 +1025,10 @@ function copy(source, destination, maxDepth) {
 }
 
 
+// eslint-disable-next-line no-self-compare
+function simpleCompare(a, b) { return a === b || (a !== a && b !== b); }
+
+
 /**
  * @ngdoc function
  * @name angular.equals
@@ -1104,7 +1109,7 @@ function equals(o1, o2) {
       }
     } else if (isDate(o1)) {
       if (!isDate(o2)) return false;
-      return equals(o1.getTime(), o2.getTime());
+      return simpleCompare(o1.getTime(), o2.getTime());
     } else if (isRegExp(o1)) {
       if (!isRegExp(o2)) return false;
       return o1.toString() === o2.toString();

Diff for: src/ng/compile.js

@@ -3434,8 +3434,7 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
             if (parentGet.literal) {
               compare = equals;
             } else {
-              // eslint-disable-next-line no-self-compare
-              compare = function simpleCompare(a, b) { return a === b || (a !== a && b !== b); };
+              compare = simpleCompare;
             }
             parentSet = parentGet.assign || function() {
               // reset the change, or we will throw this exception on every $digest
@@ -3510,9 +3509,7 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
       });
 
       function recordChanges(key, currentValue, previousValue) {
-        if (isFunction(destination.$onChanges) && currentValue !== previousValue &&
-            // eslint-disable-next-line no-self-compare
-            (currentValue === currentValue || previousValue === previousValue)) {
+        if (isFunction(destination.$onChanges) && !simpleCompare(currentValue, previousValue)) {
           // If we have not already scheduled the top level onChangesQueue handler then do so now
           if (!onChangesQueue) {
             scope.$$postDigest(flushOnChangesQueue);