1 files changed, 9 insertions, 0 deletions
diff --git a/node_modules/es5-ext/object/ensure-natural-number.js b/node_modules/es5-ext/object/ensure-natural-number.js
new file mode 100644
index 000000000..5b35e4a13
--- /dev/null
+++ b/node_modules/es5-ext/object/ensure-natural-number.js
@@ -0,0 +1,9 @@
+"use strict";
+
+var isNatural = require("../number/is-natural");
+
+module.exports = function (arg) {
+	var num = Number(arg);
+	if (!isNatural(num)) throw new TypeError(arg + " is not a natural number");
+	return num;
+};