added whole system from ola4doc

2017-12-14 17:06:06 +01:00
parent 9646c74be1
commit 0611418f7a
8725 changed files with 817688 additions and 2 deletions
@@ -0,0 +1,9 @@
+'use strict';
+
+module.exports = function (x) {
+	if (!x) return false;
+	if (typeof x === 'symbol') return true;
+	if (!x.constructor) return false;
+	if (x.constructor.name !== 'Symbol') return false;
+	return (x[x.constructor.toStringTag] === 'Symbol');
+};