From fc83f71a9db5e3f1bdffefc619b046bd6788d9d5 Mon Sep 17 00:00:00 2001
From: mrlee23 <mrlee_23@naver.com>
Date: Wed, 20 Dec 2017 23:03:12 +0900
Subject: [PATCH] Create selectProperties function

---
 lib/org-mode-parser.js | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lib/org-mode-parser.js b/lib/org-mode-parser.js
index 4e79c04..c09cdaf 100644
--- a/lib/org-mode-parser.js
+++ b/lib/org-mode-parser.js
@@ -810,6 +810,19 @@ var OrgQuery=(function ()
         });
         return new OrgQuery(nodes);
     };
+	OrgQuery.prototype.selectProperties=function(propNames, orFlag = false){
+        var nodes = [];
+        _.each(this.allNodes, function(n){
+			var names = Object.keys(n.properties);
+			if (_.isString(propNames)) {
+				names.indexOf(propNames) > -1 && nodes.push(n);
+			} else if (_.isArray(propNames)) {
+				var method = orFlag ? 'some' : 'every';
+				propNames[method](name => names.indexOf(name) > -1) && nodes.push(n);
+			}
+        });
+        return new OrgQuery(nodes);
+	};
 
     // Private manipulation function