Function items_mapPooled

items_mapPooled<T, R>(
    items: readonly T[],
    width: number,
    task: (item: T, index: number) => Promise<R>,
    signal?: AbortSignal,
): Promise<R[]>
Maps items through an async function, at most width at a time.

Results come back in the items' order, whatever order the tasks finish in. A task that throws is not caught here: map to a value that records the failure when each failure must stay its own.

A stop (the signal aborting) lets the tasks already running finish and starts no more, so what was sent is all accounted for; the items never started have no result.
Type Parameters
- T
- R
Parameters
- items: readonly T[]
  The items.
- width: number
  Tasks run at once; at least 1.
- task: (item: T, index: number) => Promise<R>
  The work for one item.
- Optionalsignal: AbortSignal
  Stops the map; absent, it runs to the end.
Returns Promise<R[]>
The started items' results, in the items' order: every item's unless stopped.
Example
```
await items_mapPooled([1, 2, 3], 2, async (n: number): Promise<number> => n * 2); // [2, 4, 6]
```
- Defined in salsa/src/plugins/pool.ts:48