Computes for each array element whether an element is NaN.
npm install compute-isnanisnan
===
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> Computes for each array element whether an element is NaN.
`` bash`
$ npm install compute-isnan
For use in the browser, use browserify.
To use the module,
` javascript`
var isnan = require( 'compute-isnan' );
#### isnan( arr )
Computes for each array element whether an element is NaN. The function returns an array with length equal to that of the input array. Each output array element is either 0 or 1. A value of 1 means that an element is NaN and 0 means that an element is __not__ NaN.
` javascript`
var out = isnan( [ 5, 'beep', 3, 9, true ] );
// returns [ 0, 1, 0, 0, 1 ]
` javascript
var isnan = require( 'compute-isnan' );
// Simulate some data...
var data = new Array( 100 ),
len = data.length,
rand;
// Division by undefined returns NaN...
for ( var i = 0; i < len; i++ ) {
rand = Math.random()*10;
if ( rand < 0.5 ) {
rand = undefined;
}
data[ i ] = 100 / rand;
}
var out = isnan( data );
// Count the number of NaNs detected...
var sum = 0;
for ( var i = 0; i < len; i++ ) {
sum += out[ i ];
}
console.log( 'Count: %d', sum );
`
To run the example code from the top-level application directory,
` bash`
$ node ./examples/index.js
Unit tests use the Mocha test framework with Chai assertions. To run the tests, execute the following command in the top-level application directory:
` bash`
$ make test
All new feature development should have corresponding unit tests to validate correct functionality.
This repository uses Istanbul as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:
` bash`
$ make test-cov
Istanbul creates a ./reports/coverage directory. To access an HTML version of the report,
` bash``
$ make view-cov
---
Copyright © 2014. Athan Reines.
[npm-image]: http://img.shields.io/npm/v/compute-isnan.svg
[npm-url]: https://npmjs.org/package/compute-isnan
[travis-image]: http://img.shields.io/travis/compute-io/isnan/master.svg
[travis-url]: https://travis-ci.org/compute-io/isnan
[coveralls-image]: https://img.shields.io/coveralls/compute-io/isnan/master.svg
[coveralls-url]: https://coveralls.io/r/compute-io/isnan?branch=master
[dependencies-image]: http://img.shields.io/david/compute-io/isnan.svg
[dependencies-url]: https://david-dm.org/compute-io/isnan
[dev-dependencies-image]: http://img.shields.io/david/dev/compute-io/isnan.svg
[dev-dependencies-url]: https://david-dm.org/dev/compute-io/isnan
[github-issues-image]: http://img.shields.io/github/issues/compute-io/isnan.svg
[github-issues-url]: https://github.com/compute-io/isnan/issues