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posix-character-classes
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posix-character-classes

LICENSE
README.md
index.js
package.json

README.md

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POSIX character classes for creating regular expressions.

Install

Install with npm:

sh
$ npm install --save posix-character-classes

Install with yarn:

sh
$ yarn add posix-character-classes

Usage

js
var posix = require('posix-character-classes');
console.log(posix.alpha);
//=> 'A-Za-z'

POSIX Character classes

The POSIX standard supports the following classes or categories of charactersh (note that classes must be defined within brackets)<sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup>:

POSIX class	Equivalent to	Matches
`[:alnum:]`	`[A-Za-z0-9]`	digits, uppercase and lowercase letters
`[:alpha:]`	`[A-Za-z]`	upper- and lowercase letters
`[:ascii:]`	`[\x00-\x7F]`	ASCII characters
`[:blank:]`	`[ \t]`	space and TAB characters only
`[:cntrl:]`	`[\x00-\x1F\x7F]`	Control characters
`[:digit:]`	`[0-9]`	digits
`[:graph:]`	`[^[:cntrl:]]`	graphic characters (all characters which have graphic representation)
`[:lower:]`	`[a-z]`	lowercase letters
`[:print:]`	`	graphic characters and space
`[:punct:]`	`[-!"#$%&'()*+,./:;<=>?@[]^_{	}~]``	all punctuation characters (all graphic characters except letters and digits)
`[:space:]`	`[ \t\n\r\f\v]`	all blank (whitespace) characters, including spaces, tabs, new lines, carriage returns, form feeds, and vertical tabs
`[:upper:]`	`[A-Z]`	uppercase letters
`[:word:]`	`[A-Za-z0-9_]`	word characters
`[:xdigit:]`	`[0-9A-Fa-f]`	hexadecimal digits

Examples

a[[:digit:]]b matches a0b, a1b, ..., a9b.
a[:digit:]b is invalid, character classes must be enclosed in brackets
[[:digit:]abc] matches any digit, as well as a, b, and c.
[abc[:digit:]] is the same as the previous, matching any digit, as well as a, b, and c
[^ABZ[:lower:]] matches any character except lowercase letters, A, B, and Z.

About

Contributing

Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).

Building docs

_(This project's readme.md is generated by verb, please don't edit the readme directly. Any changes to the readme must be made in the [.verb.md](.verb.md) readme template.)_

To generate the readme, run the following command:

sh
$ npm install -g verbose/verb#dev verb-generate-readme && verb

Running tests

Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:

sh
$ npm install && npm test

Author

Jon Schlinkert

License

_This file was generated by verb-generate-readme, v0.5.0, on April 20, 2017._

<hr class="footnotes-sep"> <section class="footnotes"> <ol class="footnotes-list"> <li id="fn1" class="footnote-item">table and examples are based on the WikiBooks page for Regular Expressions/POSIX Basic Regular Expressions, which is available under the Creative Commons Attribution-ShareAlike License. <a href="#fnref1" class="footnote-backref">↩</a>

</li> </ol> </section>

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