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20 lines
396 B
JavaScript
20 lines
396 B
JavaScript
6 years ago
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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 !== 'number' && type !== 'string') {
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return false;
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}
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var n = +num;
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return (n - n + 1) >= 0 && num !== '';
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};
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