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/*! * is-number <https://github.com/jonschlinkert/is-number> * * Copyright (c) 2014-2015, Jon Schlinkert. * Licensed under the MIT License. */ 'use strict'; var typeOf = require('kind-of'); module.exports = function isNumber(num) { var type = typeOf(num); if (type === 'string') { if (!num.trim()) return false; } else if (type !== 'number') { return false; } return (num - num + 1) >= 0; };