diff --git a/packages/core/lib/utils/promise.js b/packages/core/lib/utils/promise.js
index d4014c955..631e9f9f2 100644
--- a/packages/core/lib/utils/promise.js
+++ b/packages/core/lib/utils/promise.js
@@ -1,5 +1,18 @@
 // Generated by CoffeeScript 2.5.1
 module.exports = {
+  array_filter: async function(arr, handler) {
+    var fail;
+    fail = Symbol();
+    return ((await Promise.all(arr.map(async function(item) {
+      if ((await handler(item))) {
+        return item;
+      } else {
+        return fail;
+      }
+    })))).filter(function(i) {
+      return i !== fail;
+    });
+  },
   is: function(obj) {
     return !!obj && (typeof obj === 'object' || typeof obj === 'function') && typeof obj.then === 'function';
   }
diff --git a/packages/core/src/utils/promise.coffee b/packages/core/src/utils/promise.coffee
index 8eabb0a36..24d78824f 100644
--- a/packages/core/src/utils/promise.coffee
+++ b/packages/core/src/utils/promise.coffee
@@ -1,5 +1,11 @@
 
 module.exports =
+  array_filter: (arr, handler) ->
+    fail = Symbol()
+    (
+      await Promise.all arr.map (item) ->
+        if await handler(item) then item else fail
+    ).filter (i) -> i isnt fail
   is: (obj) ->
     # promise && !!promise.then
     return !!obj and (typeof obj is 'object' || typeof obj is 'function') and typeof obj.then is 'function'
diff --git a/packages/core/test/utils/promise.coffee b/packages/core/test/utils/promise.coffee
index fc98f30dd..5a58f575f 100644
--- a/packages/core/test/utils/promise.coffee
+++ b/packages/core/test/utils/promise.coffee
@@ -4,9 +4,19 @@ promise = require '../../src/utils/promise'
 
 describe 'utils.promise', ->
   return unless tags.api
+  
+  describe 'array_filter', ->
+    
+    it 'filter', ->
+      result = await promise.array_filter [1,2,3,4], (el) ->
+        new Promise (resolve) ->
+          setImmediate -> resolve el % 2 is 0
+      result.should.eql [2, 4]
+  
+  describe 'is', ->
 
-  it 'true', ->
-    promise.is(new Promise (->)).should.be.true()
+    it 'true', ->
+      promise.is(new Promise (->)).should.be.true()
 
-  it 'false', ->
-    promise.is({}).should.be.false()
+    it 'false', ->
+      promise.is({}).should.be.false()