From 7e9835dd80a560f4b5a33fa770411efeccfdaaec Mon Sep 17 00:00:00 2001
From: Etienne Lemay <etienne@heliom.ca>
Date: Fri, 22 Jul 2016 16:04:30 -0400
Subject: [PATCH] utils#intersect

---
 src/utils/index.js | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/utils/index.js b/src/utils/index.js
index 0d3c036..32ee325 100644
--- a/src/utils/index.js
+++ b/src/utils/index.js
@@ -67,4 +67,16 @@ function getData(emoji, skin, sheetURL) {
   return emojiData
 }
 
-export { getData, getSanitizedData }
+function intersect(a, b) {
+  var aSet = new Set(a),
+      bSet = new Set(b),
+      intersection = null
+
+  intersection = new Set(
+    [...aSet].filter(x => bSet.has(x))
+  )
+
+  return Array.from(intersection)
+}
+
+export { getData, getSanitizedData, intersect }