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129 lines
4 KiB
Markdown
129 lines
4 KiB
Markdown
# brace-expansion
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[Brace expansion](https://www.gnu.org/software/bash/manual/html_node/Brace-Expansion.html),
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as known from sh/bash, in JavaScript.
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[](http://travis-ci.org/juliangruber/brace-expansion)
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[](https://www.npmjs.org/package/brace-expansion)
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[](https://greenkeeper.io/)
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[](https://ci.testling.com/juliangruber/brace-expansion)
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## Example
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```js
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var expand = require('brace-expansion');
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expand('file-{a,b,c}.jpg')
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// => ['file-a.jpg', 'file-b.jpg', 'file-c.jpg']
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expand('-v{,,}')
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// => ['-v', '-v', '-v']
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expand('file{0..2}.jpg')
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// => ['file0.jpg', 'file1.jpg', 'file2.jpg']
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expand('file-{a..c}.jpg')
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// => ['file-a.jpg', 'file-b.jpg', 'file-c.jpg']
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expand('file{2..0}.jpg')
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// => ['file2.jpg', 'file1.jpg', 'file0.jpg']
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expand('file{0..4..2}.jpg')
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// => ['file0.jpg', 'file2.jpg', 'file4.jpg']
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expand('file-{a..e..2}.jpg')
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// => ['file-a.jpg', 'file-c.jpg', 'file-e.jpg']
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expand('file{00..10..5}.jpg')
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// => ['file00.jpg', 'file05.jpg', 'file10.jpg']
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expand('{{A..C},{a..c}}')
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// => ['A', 'B', 'C', 'a', 'b', 'c']
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expand('ppp{,config,oe{,conf}}')
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// => ['ppp', 'pppconfig', 'pppoe', 'pppoeconf']
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```
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## API
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```js
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var expand = require('brace-expansion');
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```
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### var expanded = expand(str)
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Return an array of all possible and valid expansions of `str`. If none are
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found, `[str]` is returned.
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Valid expansions are:
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```js
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/^(.*,)+(.+)?$/
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// {a,b,...}
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```
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A comma separated list of options, like `{a,b}` or `{a,{b,c}}` or `{,a,}`.
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```js
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/^-?\d+\.\.-?\d+(\.\.-?\d+)?$/
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// {x..y[..incr]}
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```
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A numeric sequence from `x` to `y` inclusive, with optional increment.
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If `x` or `y` start with a leading `0`, all the numbers will be padded
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to have equal length. Negative numbers and backwards iteration work too.
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```js
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/^-?\d+\.\.-?\d+(\.\.-?\d+)?$/
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// {x..y[..incr]}
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```
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An alphabetic sequence from `x` to `y` inclusive, with optional increment.
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`x` and `y` must be exactly one character, and if given, `incr` must be a
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number.
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For compatibility reasons, the string `${` is not eligible for brace expansion.
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## Installation
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With [npm](https://npmjs.org) do:
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```bash
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npm install brace-expansion
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```
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## Contributors
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- [Julian Gruber](https://github.com/juliangruber)
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- [Isaac Z. Schlueter](https://github.com/isaacs)
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## Sponsors
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This module is proudly supported by my [Sponsors](https://github.com/juliangruber/sponsors)!
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Do you want to support modules like this to improve their quality, stability and weigh in on new features? Then please consider donating to my [Patreon](https://www.patreon.com/juliangruber). Not sure how much of my modules you're using? Try [feross/thanks](https://github.com/feross/thanks)!
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## License
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(MIT)
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Copyright (c) 2013 Julian Gruber <julian@juliangruber.com>
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is furnished to do
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so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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