$ npm install expand-brackets
Expand POSIX bracket expressions (character classes) in glob patterns.
Install with npm:
$ npm install --save expand-brackets
Install with yarn:
$ yarn add expand-brackets
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 regexExample
console.log(brackets('[![:lower:]]'));
//=> '[^a-z]'
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}Takes an array of strings and a POSIX character class pattern, and returns a new array with only the strings that matched the pattern.
Params
arr
{Array}: Array of strings to matchpattern
{String}: POSIX character class pattern(s)options
{Object}returns
{Array}Example
const brackets = require('expand-brackets');
console.log(brackets.match(['1', 'a', 'ab'], '[[:alpha:]]'));
//=> ['a']
console.log(brackets.match(['1', 'a', 'ab'], '[[:alpha:]]+'));
//=> ['a', 'ab']
Returns true if the specified string
matches the given brackets pattern
.
Params
string
{String}: String to matchpattern
{String}: Poxis patternoptions
{String}returns
{Boolean}Example
const brackets = require('expand-brackets');
console.log(brackets.isMatch('a.a', '[[:alpha:]].[[:alpha:]]'));
//=> true
console.log(brackets.isMatch('1.2', '[[:alpha:]].[[:alpha:]]'));
//=> false
Takes a POSIX character class pattern and returns a matcher function. The returned function takes the string to match as its only argument.
Params
pattern
{String}: Poxis patternoptions
{String}returns
{Boolean}Example
const brackets = require('expand-brackets');
const isMatch = brackets.matcher('[[:lower:]].[[:upper:]]');
console.log(isMatch('a.a'));
//=> false
console.log(isMatch('a.A'));
//=> true
Create a regular expression from the given pattern
.
Params
pattern
{String}: The pattern to convert to regex.options
{Object}returns
{RegExp}Example
const brackets = require('expand-brackets');
const re = brackets.makeRe('[[:alpha:]]');
console.log(re);
//=> /^(?:[a-zA-Z])$/
Parses the given POSIX character class pattern
and returns an object with the compiled output
and optional source map
.
Params
pattern
{String}options
{Object}returns
{Object}Example
const brackets = require('expand-brackets');
console.log(brackets('[[:alpha:]]'));
// { options: { source: 'string' },
// input: '[[:alpha:]]',
// state: {},
// compilers:
// { eos: [Function],
// noop: [Function],
// bos: [Function],
// not: [Function],
// escape: [Function],
// text: [Function],
// posix: [Function],
// bracket: [Function],
// 'bracket.open': [Function],
// 'bracket.inner': [Function],
// 'bracket.literal': [Function],
// 'bracket.close': [Function] },
// output: '[a-zA-Z]',
// ast:
// { type: 'root',
// errors: [],
// nodes: [ [Object], [Object], [Object] ] },
// parsingErrors: [] }
Generate a source map for the given pattern.
Example
var res = brackets('[:alpha:]', {sourcemap: true});
console.log(res.map);
// { version: 3,
// sources: [ 'brackets' ],
// names: [],
// mappings: 'AAAA,MAAS',
// sourcesContent: [ '[:alpha:]' ] }
The following named POSIX bracket expressions are supported:
[:alnum:]
: Alphanumeric characters (a-zA-Z0-9]
)[:alpha:]
: Alphabetic characters (a-zA-Z]
)[:blank:]
: Space and tab ([ t]
)[:digit:]
: Digits ([0-9]
)[:lower:]
: Lowercase letters ([a-z]
)[:punct:]
: Punctuation and symbols. ([!"#$%&'()*+, -./:;<=>?@ [\]^_``{|}~]
)[: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
Breaking changes
expand-brackets
need to also use snapdragon 0.12.Breaking changes
expand-brackets
need to also use snapdragon 0.11.Breaking changes
Added features
.create
method to do what the main function did before v2.0.0In 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
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:]' ] }
Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
Commits | Contributor |
---|---|
69 | jonschlinkert |
13 | danez |
2 | MartinKolarik |
2 | es128 |
1 | doowb |
1 | eush77 |
1 | mjbvz |
(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:
$ 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:
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Jon Schlinkert
Copyright © 2018, Jon Schlinkert. Released under the MIT License.
This file was generated by verb-generate-readme, v0.6.0, on April 30, 2018.
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