/usr/lib/nodejs/is-number/index.js is in node-is-number 4.0.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | /*!
* 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;
};
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