j-gallery/example/node_modules/es5-ext/object/ensure-natural-number.js

a picture layout library

"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;
};