Spaces:
Runtime error
Runtime error
# balanced-match | |
Match balanced string pairs, like `{` and `}` or `<b>` and `</b>`. Supports regular expressions as well! | |
[![build status](https://secure.travis-ci.org/juliangruber/balanced-match.svg)](http://travis-ci.org/juliangruber/balanced-match) | |
[![downloads](https://img.shields.io/npm/dm/balanced-match.svg)](https://www.npmjs.org/package/balanced-match) | |
[![testling badge](https://ci.testling.com/juliangruber/balanced-match.png)](https://ci.testling.com/juliangruber/balanced-match) | |
## Example | |
Get the first matching pair of braces: | |
```js | |
var balanced = require('balanced-match'); | |
console.log(balanced('{', '}', 'pre{in{nested}}post')); | |
console.log(balanced('{', '}', 'pre{first}between{second}post')); | |
console.log(balanced(/\s+\{\s+/, /\s+\}\s+/, 'pre { in{nest} } post')); | |
``` | |
The matches are: | |
```bash | |
$ node example.js | |
{ start: 3, end: 14, pre: 'pre', body: 'in{nested}', post: 'post' } | |
{ start: 3, | |
end: 9, | |
pre: 'pre', | |
body: 'first', | |
post: 'between{second}post' } | |
{ start: 3, end: 17, pre: 'pre', body: 'in{nest}', post: 'post' } | |
``` | |
## API | |
### var m = balanced(a, b, str) | |
For the first non-nested matching pair of `a` and `b` in `str`, return an | |
object with those keys: | |
* **start** the index of the first match of `a` | |
* **end** the index of the matching `b` | |
* **pre** the preamble, `a` and `b` not included | |
* **body** the match, `a` and `b` not included | |
* **post** the postscript, `a` and `b` not included | |
If there's no match, `undefined` will be returned. | |
If the `str` contains more `a` than `b` / there are unmatched pairs, the first match that was closed will be used. For example, `{{a}` will match `['{', 'a', '']` and `{a}}` will match `['', 'a', '}']`. | |
### var r = balanced.range(a, b, str) | |
For the first non-nested matching pair of `a` and `b` in `str`, return an | |
array with indexes: `[ <a index>, <b index> ]`. | |
If there's no match, `undefined` will be returned. | |
If the `str` contains more `a` than `b` / there are unmatched pairs, the first match that was closed will be used. For example, `{{a}` will match `[ 1, 3 ]` and `{a}}` will match `[0, 2]`. | |
## Installation | |
With [npm](https://npmjs.org) do: | |
```bash | |
npm install balanced-match | |
``` | |
## License | |
(MIT) | |
Copyright (c) 2013 Julian Gruber <[email protected]> | |
Permission is hereby granted, free of charge, to any person obtaining a copy of | |
this software and associated documentation files (the "Software"), to deal in | |
the Software without restriction, including without limitation the rights to | |
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies | |
of the Software, and to permit persons to whom the Software is furnished to do | |
so, subject to the following conditions: | |
The above copyright notice and this permission notice shall be included in all | |
copies or substantial portions of the Software. | |
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
SOFTWARE. | |