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156 lines
4.5 KiB
Markdown
156 lines
4.5 KiB
Markdown
# fragment-cache [](https://www.npmjs.com/package/fragment-cache) [](https://npmjs.org/package/fragment-cache) [](https://travis-ci.org/jonschlinkert/fragment-cache)
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> A cache for managing namespaced sub-caches
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## Install
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Install with [npm](https://www.npmjs.com/):
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```sh
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$ npm install --save fragment-cache
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```
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## Usage
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```js
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var Fragment = require('fragment-cache');
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var fragment = new Fragment();
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```
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## API
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### [FragmentCache](index.js#L24)
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Create a new `FragmentCache` with an optional object to use for `caches`.
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**Example**
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```js
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var fragment = new FragmentCache();
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```
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**Params**
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* `cacheName` **{String}**
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* `returns` **{Object}**: Returns the [map-cache](https://github.com/jonschlinkert/map-cache) instance.
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### [.cache](index.js#L49)
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Get cache `name` from the `fragment.caches` object. Creates a new `MapCache` if it doesn't already exist.
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**Example**
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```js
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var cache = fragment.cache('files');
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console.log(fragment.caches.hasOwnProperty('files'));
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//=> true
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```
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**Params**
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* `cacheName` **{String}**
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* `returns` **{Object}**: Returns the [map-cache](https://github.com/jonschlinkert/map-cache) instance.
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### [.set](index.js#L67)
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Set a value for property `key` on cache `name`
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**Example**
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```js
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fragment.set('files', 'somefile.js', new File({path: 'somefile.js'}));
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```
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**Params**
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* `name` **{String}**
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* `key` **{String}**: Property name to set
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* `val` **{any}**: The value of `key`
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* `returns` **{Object}**: The cache instance for chaining
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### [.has](index.js#L93)
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Returns true if a non-undefined value is set for `key` on fragment cache `name`.
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**Example**
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```js
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var cache = fragment.cache('files');
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cache.set('somefile.js');
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console.log(cache.has('somefile.js'));
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//=> true
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console.log(cache.has('some-other-file.js'));
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//=> false
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```
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**Params**
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* `name` **{String}**: Cache name
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* `key` **{String}**: Optionally specify a property to check for on cache `name`
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* `returns` **{Boolean}**
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### [.get](index.js#L115)
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Get `name`, or if specified, the value of `key`. Invokes the [cache](#cache) method, so that cache `name` will be created it doesn't already exist. If `key` is not passed, the entire cache (`name`) is returned.
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**Example**
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```js
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var Vinyl = require('vinyl');
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var cache = fragment.cache('files');
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cache.set('somefile.js', new Vinyl({path: 'somefile.js'}));
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console.log(cache.get('somefile.js'));
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//=> <File "somefile.js">
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```
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**Params**
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* `name` **{String}**
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* `returns` **{Object}**: Returns cache `name`, or the value of `key` if specified
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## About
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### Related projects
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* [base](https://www.npmjs.com/package/base): base is the foundation for creating modular, unit testable and highly pluggable node.js applications, starting… [more](https://github.com/node-base/base) | [homepage](https://github.com/node-base/base "base is the foundation for creating modular, unit testable and highly pluggable node.js applications, starting with a handful of common methods, like `set`, `get`, `del` and `use`.")
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* [map-cache](https://www.npmjs.com/package/map-cache): Basic cache object for storing key-value pairs. | [homepage](https://github.com/jonschlinkert/map-cache "Basic cache object for storing key-value pairs.")
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### Contributing
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Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).
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### Building docs
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_(This document was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme) (a [verb](https://github.com/verbose/verb) generator), please don't edit the readme directly. Any changes to the readme must be made in [.verb.md](.verb.md).)_
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To generate the readme and API documentation with [verb](https://github.com/verbose/verb):
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```sh
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$ npm install -g verb verb-generate-readme && verb
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```
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### Running tests
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Install dev dependencies:
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```sh
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$ npm install -d && npm test
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```
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### Author
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**Jon Schlinkert**
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* [github/jonschlinkert](https://github.com/jonschlinkert)
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* [twitter/jonschlinkert](http://twitter.com/jonschlinkert)
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### License
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Copyright © 2016, [Jon Schlinkert](https://github.com/jonschlinkert).
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Released under the [MIT license](https://github.com/jonschlinkert/fragment-cache/blob/master/LICENSE).
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***
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_This file was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme), v0.2.0, on October 17, 2016._ |