53 lines
2.5 KiB
Markdown
53 lines
2.5 KiB
Markdown
[](https://www.npmjs.org/package/collect-all)
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[](https://www.npmjs.org/package/collect-all)
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[](https://travis-ci.org/75lb/collect-all)
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[](https://david-dm.org/75lb/collect-all)
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[](https://github.com/feross/standard)
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<a name="module_collect-all"></a>
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## collect-all
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Returns a stream which fires a callback and becomes readable once all input is received.
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By default the callback is invoked with a Buffer instance containing all concatenated input. If you set the option `{ objectMode: true }` the callback is invoked with an array containing all objects received.
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<a name="exp_module_collect-all--collectAll"></a>
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### collectAll([callback], [options]) ⇒ [<code>Duplex</code>](https://nodejs.org/api/stream.html#stream_class_stream_duplex) ⏏
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**Kind**: Exported function
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| Param | Type | Description |
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| --- | --- | --- |
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| [callback] | <code>function</code> | Called once with the collected input data (by default a `Buffer` instance, or array in `objectMode`.). The value returned by this callback function will be passed downstream. |
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| [options] | <code>object</code> | [Stream options](https://nodejs.org/dist/latest-v5.x/docs/api/stream.html#stream_new_stream_readable_options) object, passed to the constructor for the stream returned by `collect-all`. If the callback function supplied returns a non-string/buffer value, set `options.objectMode` to `true`. |
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**Example**
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An example command-line client script - string input received at stdin is stamped with `received` then written to stdout.
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```js
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var collectAll = require('collect-all')
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process.stdin
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.pipe(collectAll(function (input) {
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input = 'received: ' + input
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return input
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}))
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.pipe(process.stdout)
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```
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An object-mode example:
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```js
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var collectAll = require('collect-all')
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function onAllCollected (collected) {
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console.log('Objects collected: ' + collected.length)
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}
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var stream = collectAll(onAllCollected, { objectMode: true })
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stream.write({})
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stream.write({})
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stream.end({}) // outputs 'Objects collected: 3'
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```
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* * *
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© 2015-17 Lloyd Brookes \<75pound@gmail.com\>. Documented by [jsdoc-to-markdown](https://github.com/jsdoc2md/jsdoc-to-markdown).
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