Function rollup

rollup<T, K, R>(
    values: readonly T[],
    reduce: (group: readonly T[]) => R,
    key: (v: T) => K,
): Map<K, R>
Type Parameters
- T
- K
- R
Parameters
- values: readonly T[]
- reduce: (group: readonly T[]) => R
- key: (v: T) => K
Returns Map<K, R>
- Defined in math/array.ts:105