From b76b467436f38387fac91ff41771a036b7a68451 Mon Sep 17 00:00:00 2001
From: hide_d <hided62@gmail.com>
Date: Thu, 4 Oct 2018 02:07:31 +0900
Subject: [PATCH] =?UTF-8?q?=EC=9C=A0=ED=8B=B8=EB=A6=AC=ED=8B=B0=20?=
 =?UTF-8?q?=ED=95=A8=EC=88=98=20=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
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---
 src/sammo/Json.php |  3 +++
 src/sammo/Util.php | 11 +++++++++++
 2 files changed, 14 insertions(+)

diff --git a/src/sammo/Json.php b/src/sammo/Json.php
index 0c4797b7..88866e2d 100644
--- a/src/sammo/Json.php
+++ b/src/sammo/Json.php
@@ -27,6 +27,9 @@ class Json
 
     public static function decode($value)
     {
+        if($value === null){
+            return null;
+        }
         return json_decode($value, true);
     }
 
diff --git a/src/sammo/Util.php b/src/sammo/Util.php
index 42c73fc7..afcf2398 100644
--- a/src/sammo/Util.php
+++ b/src/sammo/Util.php
@@ -269,6 +269,17 @@ class Util extends \utilphp\util
         return $result;
     }
 
+    public static function pickArrayFromArrayOfDictWithKey(array $arrayOfDict, string $key):array{
+        $result = [];
+        foreach($arrayOfDict as $array){
+            if(!key_exist($key, $array)){
+                continue;
+            }
+            $result[] = $array[$key];
+        }
+        return $result;
+    }
+
     public static function convertArrayToDict($arr, $keyName)
     {
         $result = [];