Accumulation Get Item¶
Retrieves a single item from an accumulation by its index. If the index is valid, it returns the element at that position; if it is invalid, it returns a null value.
Usage¶
Use this node when you need to access a specific element from a previously built accumulation (e.g., after collecting items across steps). Typical workflow: build or receive an accumulation, then use this node to fetch the element at a given zero-based index for downstream processing.
Inputs¶
| Field | Required | Type | Description | Example |
|---|---|---|---|---|
| accumulation | True | ACCUMULATION | The accumulation object that holds a sequence of items collected from prior steps. | An accumulation produced by 'Accumulate' or 'List to Accumulation' |
| index | True | INT | Zero-based index of the item to retrieve. Negative indices select from the end (e.g., -1 for the last item). | 0 |
Outputs¶
| Field | Type | Description | Example |
|---|---|---|---|
| item | WILDCARD | The item at the specified index within the accumulation. Type depends on what was stored in the accumulation. | 42 |
Important Notes¶
- Indexing: Uses zero-based indexing; negative indices are allowed to access from the end.
- Out-of-range handling: If the index is out of bounds or the accumulation is invalid, the output will be null.
- Type variability: The output type is dynamic and matches the type of the item stored in the accumulation.
Troubleshooting¶
- Output is null: The index may be out of range or the accumulation is empty. Verify the accumulation length and adjust the index.
- Unexpected item type: Accumulations can contain mixed types. Ensure the downstream node can accept the retrieved item's type.
- Wrong element returned: Remember indexing is zero-based; confirm the intended position and adjust the index accordingly.