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  • License MIT

The fast way to check if a JS object is numeric

Package Exports

  • fast-isnumeric

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (fast-isnumeric) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

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.