GoLang：如何从2D切片中删除元素？

Question

I've recently been messing around with Go and I wanted to see how it would be to delete an element from a two-dimensional slice.

For deleting an element from a one-dimensional slice, I can successfully use:

data = append(data[:i], data[i+1:]...)

However, with a two-dimensional slice, using:

data = append(data[i][:j], data[i][j+1:]...)

throws the error:

cannot use append(data[i][:j], data[i][j+1:]...) (type []string) as type [][]string in assignment

Would tackling this require a different approach?

Answer 1

Here is one of the possible approaches <kbd>Go Playground</kbd>.

b := [][]int{
    []int{1, 2, 3, 4},
    []int{5, 6, 7, 8},
    []int{9, 0, -1, -2},
    []int{-3, -4, -5, -6},
}
print2D(b)
i, j := 2, 2


tmp := append(b[i][:j], b[i][j+1:]...)
c := append(b[:i], tmp)
c = append(c, b[i+1:]...)
print2D(c)

Basically I am extracting the i-th row, remove the element from it append(b[i][:j], b[i][j+1:]...) and then put this row between the rows.

If someone would tell how to append many elements, it would look even nicer.