Function readTableIndex

readTableIndex<Row extends Record<string, unknown>>(
rows: readonly Row[],
options: Pick<MwlTableMapOptions<Row>, "key">,
): Map<string, Row[]>
Builds an inverse index, retaining every row that shares a projected key.
Type Parameters
- Row extends Record<string, unknown>
Parameters
- rows: readonly Row[]
- options: Pick<MwlTableMapOptions<Row>, "key">
Returns Map<string, Row[]>
Example
```
import { readTableIndex, tableKey } from '@datamoc/mw_games/mwl';
const rows = [{ item: 'potion', effect: 'heal' }, { item: 'herb', effect: 'heal' }];
const byEffect = readTableIndex(rows, { key: 'effect' });
console.log(byEffect.get(tableKey('heal'))?.length); // 2
```
- Defined in src/mwl/readers.ts:134