Specify arguments more accurate

Author: btd

lib/ext/property.js

@@ -5,7 +5,7 @@
  * MIT Licensed
  */
 
-import { format, formatProp, convertPropertyName, isIndexable, length } from '../util';
+import { format, formatProp, convertPropertyName, length } from '../util';
 import eql from 'should-equal';
 
 var aSlice = Array.prototype.slice;
@@ -39,7 +39,7 @@ export default function(should, Assertion) {
       var arg = arguments[0];
       if (typeof arg === 'string') {
         args.names = [arg];
-      } else if (isIndexable(arg)) {
+      } else if (Array.isArray(arg)) {
         args.names = arg;
       } else {
         args.names = Object.keys(arg);