/*! | |
* is-number <https://github.com/jonschlinkert/is-number> | |
* | |
* Copyright (c) 2014-2017, Jon Schlinkert. | |
* Released under the MIT License. | |
*/ | |
'use strict'; | |
module.exports = function isNumber(num) { | |
var type = typeof num; | |
if (type === 'string' || num instanceof String) { | |
// an empty string would be coerced to true with the below logic | |
if (!num.trim()) return false; | |
} else if (type !== 'number' && !(num instanceof Number)) { | |
return false; | |
} | |
return (num - num + 1) >= 0; | |
}; |