kitchensink/examples/node_modules/es5-ext/object/ensure-natural-number.js

Dispatch's awesome components and style guide

'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;
};