在Go切片中附加时超出范围

Question

In some cases when i == len(SliceA) i get a slice out of bounds error.

//filterIntersection removes points from two slices that have common points.
func filterIntersection(sliceA, sliceB *[]ds.Coord) {
    for i, a := range *sliceA {
        for j, b := range *sliceB {
            if a == b {
                (*sliceA) = append((*sliceA)[:i], (*sliceA)[i+1:]...) <--- error here
                (*sliceB) = append((*sliceB)[:j], (*sliceB)[j+1:]...)
            }
        }
    }
}

Answer 1

Well if i == len(SliceA), then sliceA[i+1] is out of bounds! It is not "in some cases" but in every case, and the same will happen for SliceB.

Consider breaking out of your loop if i == len(SliceA) or j == len(SliceB).

Another solution would be to use a "regular" for loop: for i := 0; i < len(SliceA); i++