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19 lines
396 B
19 lines
396 B
/*! |
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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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