From 05c148ab9f58bf2e56334c5fd71cfe804647a7a8 Mon Sep 17 00:00:00 2001
From: andrew-coleman <andrew_coleman@uk.ibm.com>
Date: Thu, 10 Jan 2019 11:50:49 +0000
Subject: [PATCH] $each should not result in undefined values in the result
 object

---
 src/functions.js                                  | 5 ++++-
 test/test-suite/groups/function-each/case002.json | 7 +++++++
 2 files changed, 11 insertions(+), 1 deletion(-)
 create mode 100644 test/test-suite/groups/function-each/case002.json

diff --git a/src/functions.js b/src/functions.js
index 697aefed..c62f41cc 100644
--- a/src/functions.js
+++ b/src/functions.js
@@ -1630,7 +1630,10 @@ const functions = (() => {
         for (var key in obj) {
             var func_args = hofFuncArgs(func, obj[key], key, obj);
             // invoke func
-            result.push(yield* func.apply(this, func_args));
+            var val = yield* func.apply(this, func_args);
+            if(typeof val !== 'undefined') {
+                result.push(val);
+            }
         }
 
         return result;
diff --git a/test/test-suite/groups/function-each/case002.json b/test/test-suite/groups/function-each/case002.json
new file mode 100644
index 00000000..f49801cb
--- /dev/null
+++ b/test/test-suite/groups/function-each/case002.json
@@ -0,0 +1,7 @@
+{
+    "expr": "$each(function($v, $k) {$k[$v>2]})",
+    "data": { "a": 1, "b": 2, "c": 3, "d": 4 },
+    "bindings": {},
+    "result": ["c", "d"],
+    "unordered": true
+}