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README.md
expand-brackets
Expand POSIX bracket expressions (character classes) in glob patterns.
Install
Install with npm:
$ npm install --save expand-brackets
Usage
var brackets = require('expand-brackets');
brackets(string[, options]);
Params
The main export is a function that takes the following parameters:
pattern
{String}: the pattern to convertoptions
{Object}: optionally supply an options objectreturns
{String}: returns a string that can be used to create a regex
Example
console.log(brackets('[![:lower:]]'));
//=> '[^a-z]'
API
brackets
Parses the given POSIX character class pattern
and returns a
string that can be used for creating regular expressions for matching.
Params
pattern
{String}options
{Object}returns
{Object}
.match
Takes an array of strings and a POSIX character class pattern, and returns a new array with only the strings that matched the pattern.
Example
var brackets = require('expand-brackets');
console.log(brackets.match(['1', 'a', 'ab'], '[[:alpha:]]'));
//=> ['a']
console.log(brackets.match(['1', 'a', 'ab'], '[[:alpha:]]+'));
//=> ['a', 'ab']
Params
arr
{Array}: Array of strings to matchpattern
{String}: POSIX character class pattern(s)options
{Object}returns
{Array}
.isMatch
Returns true if the specified string
matches the given brackets pattern
.
Example
var brackets = require('expand-brackets');
console.log(brackets.isMatch('a.a', '[[:alpha:]].[[:alpha:]]'));
//=> true
console.log(brackets.isMatch('1.2', '[[:alpha:]].[[:alpha:]]'));
//=> false
Params
string
{String}: String to matchpattern
{String}: Poxis patternoptions
{String}returns
{Boolean}
.matcher
Takes a POSIX character class pattern and returns a matcher function. The returned function takes the string to match as its only argument.
Example
var brackets = require('expand-brackets');
var isMatch = brackets.matcher('[[:lower:]].[[:upper:]]');
console.log(isMatch('a.a'));
//=> false
console.log(isMatch('a.A'));
//=> true
Params
pattern
{String}: Poxis patternoptions
{String}returns
{Boolean}
.makeRe
Create a regular expression from the given pattern
.
Example
var brackets = require('expand-brackets');
var re = brackets.makeRe('[[:alpha:]]');
console.log(re);
//=> /^(?:[a-zA-Z])$/
Params
pattern
{String}: The pattern to convert to regex.options
{Object}returns
{RegExp}
.create
Parses the given POSIX character class pattern
and returns an object with the compiled output
and optional source map
.
Example
var brackets = require('expand-brackets');
console.log(brackets('[[:alpha:]]'));
// { options: { source: 'string' },
// input: '[[:alpha:]]',
// state: {},
// compilers:
// { eos: [Function],
// noop: [Function],
// bos: [Function],
// not: [Function],
// escape: [Function],
// text: [Function],
// posix: [Function],
// bracket: [Function],
// 'bracket.open': [Function],
// 'bracket.inner': [Function],
// 'bracket.literal': [Function],
// 'bracket.close': [Function] },
// output: '[a-zA-Z]',
// ast:
// { type: 'root',
// errors: [],
// nodes: [ [Object], [Object], [Object] ] },
// parsingErrors: [] }
Params
pattern
{String}options
{Object}returns
{Object}
Options
options.sourcemap
Generate a source map for the given pattern.
Example
var res = brackets('[:alpha:]', {sourcemap: true});
console.log(res.map);
// { version: 3,
// sources: [ 'brackets' ],
// names: [],
// mappings: 'AAAA,MAAS',
// sourcesContent: [ '[:alpha:]' ] }
POSIX Character classes
The following named POSIX bracket expressions are supported:
[:alnum:]
: Alphanumeric characters (a-zA-Z0-9]
)[:alpha:]
: Alphabetic characters (a-zA-Z]
)[:blank:]
: Space and tab ([ t]
)[:digit:]
: Digits ([0-9]
)[:lower:]
: Lowercase letters ([a-z]
)[:punct:]
: Punctuation and symbols. ([!"#$%&'()*+, -./:;<=>?@ [\]^_``{|}~]
)[:upper:]
: Uppercase letters ([A-Z]
)[:word:]
: Word characters (letters, numbers and underscores) ([A-Za-z0-9_]
)[:xdigit:]
: Hexadecimal digits ([A-Fa-f0-9]
)
See posix-character-classes for more details.
Not supported
- equivalence classes are not supported
- POSIX.2 collating symbols are not supported
Changelog
v2.0.0
Breaking changes
- The main export now returns the compiled string, instead of the object returned from the compiler
Added features
- Adds a
.create
method to do what the main function did before v2.0.0
v0.2.0
In addition to performance and matching improvements, the v0.2.0 refactor adds complete POSIX character class support, with the exception of equivalence classes and POSIX.2 collating symbols which are not relevant to node.js usage.
Added features
- parser is exposed, so that expand-brackets parsers can be used by upstream parsers (like micromatch)
- compiler is exposed, so that expand-brackets compilers can be used by upstream compilers
- source maps
source map example
var brackets = require('expand-brackets');
var res = brackets('[:alpha:]');
console.log(res.map);
{ version: 3,
sources: [ 'brackets' ],
names: [],
mappings: 'AAAA,MAAS',
sourcesContent: [ '[:alpha:]' ] }
About
Related projects
- braces: Fast, comprehensive, bash-like brace expansion implemented in JavaScript. Complete support for the Bash 4.3 braces… more | homepage
- extglob: Extended glob support for JavaScript. Adds (almost) the expressive power of regular expressions to glob… more | homepage
- micromatch: Glob matching for javascript/node.js. A drop-in replacement and faster alternative to minimatch and multimatch. | homepage
- nanomatch: Fast, minimal glob matcher for node.js. Similar to micromatch, minimatch and multimatch, but complete Bash… more | homepage
Contributing
Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
Contributors
Commits | Contributor |
---|---|
66 | jonschlinkert |
2 | MartinKolarik |
2 | es128 |
1 | eush77 |
Building docs
(This document was generated by verb-generate-readme (a verb generator), please don't edit the readme directly. Any changes to the readme must be made in .verb.md.)
To generate the readme and API documentation with verb:
$ npm install -g verb verb-generate-readme && verb
Running tests
Install dev dependencies:
$ npm install -d && npm test
Author
Jon Schlinkert
License
Copyright © 2016, Jon Schlinkert. Released under the MIT license.
This file was generated by verb-generate-readme, v0.2.0, on December 12, 2016.