POSIX character classes for creating regular expressions.
npm install posix-character-classes> POSIX character classes for creating regular expressions.
Install with npm:
``sh`
$ npm install --save posix-character-classes
Install with yarn:
`sh`
$ yarn add posix-character-classes
`js`
var posix = require('posix-character-classes');
console.log(posix.alpha);
//=> 'A-Za-z'
The POSIX standard supports the following classes or categories of charactersh (note that classes must be defined within brackets)[1]:
| 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:]
| | [[:graph] ] | 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 |
* 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
* matches any character except lowercase letters, A, B, and Z.
Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
_(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 readme template.)_
To generate the readme, run the following command:
`sh`
$ npm install -g verbose/verb#dev verb-generate-readme && verb
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
Jon Schlinkert
* github/jonschlinkert
* twitter/jonschlinkert
Copyright © 2017, Jon Schlinkert.
Released under the MIT License.
*
_This file was generated by verb-generate-readme, v0.5.0, on April 20, 2017._