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