Interface RollupOptions<T>

Options for rollup.

interface RollupOptions<T> {
    by: KeyAccessor<T>;
    value: NumberAccessor<T>;
    metrics?: Record<string, NumberAccessor<T>>;
    precision?: number;
}

Properties

How to determine which group each item belongs to.

The primary numeric value to sum (used later for Pareto ranking).

metrics?: Record<string, NumberAccessor<T>>

Additional named numeric metrics to sum per group. Each entry becomes a key on RollupEntry.metrics.

metrics: { cost: (r) => r.cost, units: 'quantity' }

precision?: number

Decimal places for the rounded average. Defaults to 4.