From d82593741118a0b61021514cc803a70c94400107 Mon Sep 17 00:00:00 2001
From: jdalton <john.david.dalton@gmail.com>
Date: Sun, 3 May 2015 22:57:45 -0700
Subject: [PATCH] Ensure `customizer` results are respected by `_.isEqual`.

---
 lodash.src.js |  5 ++++-
 test/test.js  | 19 +++++++++++++++----
 2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/lodash.src.js b/lodash.src.js
index ed496ecb6..b42720f84 100644
--- a/lodash.src.js
+++ b/lodash.src.js
@@ -3928,7 +3928,10 @@
             othValue = other[index],
             result = customizer ? customizer(isLoose ? othValue : arrValue, isLoose ? arrValue : othValue, index) : undefined;
 
-        if (result !== undefined && !result) {
+        if (result !== undefined) {
+          if (result) {
+            continue;
+          }
           return false;
         }
         // Recursively compare arrays (susceptible to call stack limits).
diff --git a/test/test.js b/test/test.js
index d96262d78..24804e787 100644
--- a/test/test.js
+++ b/test/test.js
@@ -7749,15 +7749,26 @@
       strictEqual(_.isEqual('a', 'a', _.noop), true);
     });
 
+    test('should not handle comparisons if `customizer` returns `true`', 3, function() {
+      var customizer = function(value) {
+        return _.isString(value) || undefined;
+      };
+
+      strictEqual(_.isEqual('a', 'b', customizer), true);
+      strictEqual(_.isEqual(['a'], ['b'], customizer), true);
+      strictEqual(_.isEqual({ '0': 'a' }, { '0': 'b' }, customizer), true);
+    });
+
     test('should return a boolean value even if `customizer` does not', 2, function() {
-      var actual = _.isEqual('a', 'a', _.constant('a'));
+      var actual = _.isEqual('a', 'b', _.constant('c'));
       strictEqual(actual, true);
 
-      var expected = _.map(falsey, _.constant(false));
+      var values = _.without(falsey, undefined),
+          expected = _.map(values, _.constant(false));
 
       actual = [];
-      _.each(falsey, function(value) {
-        actual.push(_.isEqual('a', 'b', _.constant(value)));
+      _.each(values, function(value) {
+        actual.push(_.isEqual('a', 'a', _.constant(value)));
       });
 
       deepEqual(actual, expected);