2 * is-number <https://github.com/jonschlinkert/is-number>
4 * Copyright (c) 2014-2015, Jon Schlinkert.
5 * Licensed under the MIT License.
10 var typeOf = require('kind-of');
12 module.exports = function isNumber(num) {
13 var type = typeOf(num);
14 if (type !== 'number' && type !== 'string') {
18 return (n - n + 1) >= 0 && num !== '';