Sum, Avg, Min, Max

035_sum_avg_min_max.cell

// ============================================================================
// 035 — Sum, Avg, Min, Max
// ============================================================================
// Convenience aggregation functions that work on a whole list.
//
// Run:   soma run 035_sum_avg_min_max.cell run
// Expect:
//   Total revenue: 520
//   Average revenue: 104
//   Lowest: {"region": "East", "revenue": 45}
//   Highest: {"region": "West", "revenue": 200}

cell Aggregates {

    on run() {
        let sales = list(
            map("region", "West", "revenue", 200),
            map("region", "East", "revenue", 45),
            map("region", "North", "revenue", 150),
            map("region", "South", "revenue", 125)
        )

        // sum_by sums a numeric field across all rows
        let total = sales |> sum_by("revenue")
        print("Total revenue: {total}")

        // avg_by computes the mean
        let average = sales |> avg_by("revenue")
        print("Average revenue: {average}")

        // min_by / max_by return the entire row with the min/max value
        let lowest = sales |> min_by("revenue")
        print("Lowest: {lowest}")

        let highest = sales |> max_by("revenue")
        print("Highest: {highest}")

        return "done"
    }
}