@vates/async-each
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Run async fn for each item in (async) iterable
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# @vates/async-each
[](https://npmjs.org/package/@vates/async-each)  [](https://bundlephobia.com/result?p=@vates/async-each) [](https://npmjs.org/package/@vates/async-each)
> Run async fn for each item in (async) iterable
## Install
Installation of the [npm package](https://npmjs.org/package/@vates/async-each):
```sh
npm install --save @vates/async-each
```
## Usage
### `asyncEach(iterable, iteratee, [opts])`
Executes `iteratee` in order for each value yielded by `iterable`.
Returns a promise wich rejects as soon as a call to `iteratee` throws or a promise returned by it rejects, and which resolves when all promises returned by `iteratee` have resolved.
`iterable` must be an iterable or async iterable.
`iteratee` is called with the same `this` value as `asyncEach`, and with the following arguments:
- `value`: the value yielded by `iterable`
- `index`: the 0-based index for this value
- `iterable`: the iterable itself
`opts` is an object that can contains the following options:
- `concurrency`: a number which indicates the maximum number of parallel call to `iteratee`, defaults to `10`. The value `0` means no concurrency limit.
- `signal`: an abort signal to stop the iteration
- `stopOnError`: whether to stop iteration of first error, or wait for all calls to finish and throw an `AggregateError`, defaults to `true`
```js
import { asyncEach } from '@vates/async-each'
const contents = []
await asyncEach(
['foo.txt', 'bar.txt', 'baz.txt'],
async function (filename, i) {
contents[i] = await readFile(filename)
},
{
// reads two files at a time
concurrency: 2,
}
)
```
## Contributions
Contributions are _very_ welcomed, either on the documentation or on
the code.
You may:
- report any [issue](https://github.com/vatesfr/xen-orchestra/issues)
you've encountered;
- fork and create a pull request.
## License
[ISC](https://spdx.org/licenses/ISC) © [Vates SAS](https://vates.fr)