// Merge return a new slice that combines all values of input slices
func Merge[T any](slices ...[]T) []T {
	sl := 0
	for i := range slices {
		sl += len(slices[i])
	}
	result := make([]T, sl)
	cp := 0
	for _, s := range slices {
		if sLen := len(s); sLen != 0 {
			copy(result[cp:], s)
			cp += sLen
		}
	}
	return result
}

	resultSS := MergeSlices([]string{}, []string{"a", "b"}, []string{"c"}, nil)
	assert.EqualValues(t, []string{"a", "b", "c"}, resultSS)

	resultIS := MergeSlices([]int{}, []int{1, 2}, []int{4}, nil)
	assert.EqualValues(t, []int{1, 2, 4}, resultIS)