fast-isnumeric
The fast way to check if a JS object is numeric
Install
npm install fast-isnumeric
API
var isNumeric = require('fast-isnumeric');
isNumeric(/* any JS object */);
How fast
Run comparison on jsperf: http://jsperf.com/isnumeric-jquery-and-alternate/5
Warning
Please look up the test cases in test.js before using this module.
Most importantly, fast-isnumeric
returns false on number and string constructors. That is, isNumeric(new Number(1))
and isNumeric(new String('1'))
are false.
Tests
Test locally with karma:
npm test
Why?
In plotly's javascript graphing library plotly.js numerical objects must be accounted for in numerous hot code paths. Inspired by Jon Schlinkert's is-number, fast-isnumeric
is significantly simplified and sped up by ignoring number and string constructors.
Author
Alex Johnson | https://github.com/alexcjohnson
License
Copyright (c) 2015 Alex Johnson Released under the MIT license.