README
isHexString
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 standard0x
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.
Community
License
See LICENSE.
Copyright
Copyright © 2016-2022. The Stdlib Authors.