@stdlib/assert-is-hex-string
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    0.0.7 • Public • Published

    isHexString

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    Test whether a string contains only hexadecimal digits.

    Installation

    npm install @stdlib/assert-is-hex-string

    Usage

    var isHexString = require( '@stdlib/assert-is-hex-string' );

    isHexString( value )

    Tests whether a string contains only hexadecimal digits.

    var bool = isHexString( '0123456789abcdefABCDEF' );
    // returns true

    Notes

    • For non-string values, the function returns false.
    • The function does not recognize x (as in the standard 0x prefix).

    Examples

    var isHexString = require( '@stdlib/assert-is-hex-string' );
    
    var out = isHexString( '0123456789abcdefABCDEF' );
    // returns true
    
    out = isHexString( '' );
    // returns false
    
    out = isHexString( '0xffffff' );
    // returns false
    
    out = isHexString( 123 );
    // returns false

    CLI

    Installation

    To use the module as a general utility, install the module globally

    npm install -g @stdlib/assert-is-hex-string

    Usage

    Usage: is-hex-string [options] [<string>]
    
    Options:
    
      -h,    --help                Print this message.
      -V,    --version             Print the package version.
    

    Examples

    $ is-hex-string 0123456789abcdefABCDEF
    true

    To use as a standard stream,

    $ echo -n '0123456789abcdefABCDEF' | is-hex-string
    true

    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.

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    License

    See LICENSE.

    Copyright

    Copyright © 2016-2021. The Stdlib Authors.

    Install

    npm i @stdlib/assert-is-hex-string

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    12

    Version

    0.0.7

    License

    Apache-2.0

    Unpacked Size

    39.1 kB

    Total Files

    12

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser