grokify/mogo

package slicesutil

func SliceIntSum(s []int) int {
    sum := 0
    for _, si := range s {
        sum += si
    }
    return sum
}

func MatrixIntColSums(m [][]int) []int {
    sums := []int{}
    for _, r := range m {
        for ci, c := range r {
            for ci >= len(sums) {
                sums = append(sums, 0)
            }
            sums[ci] += c
        }
    }
    return sums
}