Function batchedForEach

batchedForEach<T>(
    arr: T[],
    batch_size: number,
    fn: (batch: T[], index: number) => Promise<void>,
): Promise<void>
Asynchronously iterates over an array in batches.
Type Parameters
- T
  Element type.
Parameters
- arr: T[]
  The array to iterate.
- batch_size: number
  Items per batch (0 = entire array as one batch).
- fn: (batch: T[], index: number) => Promise<void>
  Async callback (batch, startIndex) => Promise<void>.
Returns Promise<void>
Throws
If batch_size is negative or not a safe integer.
Example
```
await batchedForEach([1, 2, 3, 4, 5], 2, async (batch, i) => {
  console.log(i, batch); // 0 [1,2], 2 [3,4], 4 [5]
});
```
- Defined in src/function/batch.ts:19