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    @stdlib/assert-is-nan
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    0.0.8 • Public • Published

    isNaN

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    Test if a value is NaN.

    Installation

    npm install @stdlib/assert-is-nan

    Usage

    var isnan = require( '@stdlib/assert-is-nan' );

    isnan( value )

    Tests if a value is NaN.

    var Number = require( '@stdlib/number-ctor' );
    
    var bool = isnan( NaN );
    // returns true
    
    bool = isnan( new Number( NaN ) );
    // returns true
    
    bool = isnan( 3.14 );
    // returns false
    
    bool = isnan( null );
    // returns false

    isnan.isPrimitive( value )

    Tests if a value is a NaN primitive number.

    var Number = require( '@stdlib/number-ctor' );
    
    var bool = isnan.isPrimitive( NaN );
    // returns true
    
    bool = isnan.isPrimitive( 3.14 );
    // returns false
    
    bool = isnan.isPrimitive( new Number( NaN ) );
    // returns false

    isnan.isObject( value )

    Tests if a value is a Number object having a value of NaN.

    var Number = require( '@stdlib/number-ctor' );
    
    var bool = isnan.isObject( NaN );
    // returns false
    
    bool = isnan.isObject( new Number( NaN ) );
    // returns true

    Examples

    var Number = require( '@stdlib/number-ctor' );
    var Symbol = require( '@stdlib/symbol-ctor' );
    var isnan = require( '@stdlib/assert-is-nan' );
    
    var bool = isnan( NaN );
    // returns true
    
    bool = isnan( new Number( NaN ) );
    // returns true
    
    bool = isnan( 5 );
    // returns false
    
    bool = isnan( '5' );
    // returns false
    
    bool = isnan( null );
    // returns false
    
    bool = isnan( Symbol( 'NaN' ) );
    // returns false

    See Also


    Notice

    This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

    For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

    Community

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    License

    See LICENSE.

    Copyright

    Copyright © 2016-2022. The Stdlib Authors.

    Install

    npm i @stdlib/assert-is-nan

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    31,222

    Version

    0.0.8

    License

    Apache-2.0

    Unpacked Size

    42.8 kB

    Total Files

    11

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser