use simple 'in' check rather than _.has in memoize

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/memoize.js b/lib/memoize.js
index 325f4f1..d1af636 100644
--- a/lib/memoize.js
+++ b/lib/memoize.js
@@ -2,11 +2,14 @@
 
 import identity from 'lodash/identity';
 import rest from 'lodash/rest';
-import has from 'lodash/has';
 
 import setImmediate from './internal/setImmediate';
 import initialParams from './internal/initialParams';
 
+function has(obj, key) {
+    return key in obj;
+}
+
 export default function memoize(fn, hasher) {
     var memo = Object.create(null);
     var queues = Object.create(null);