[Golang language version] LeetCode 867. Transpose Matrix matrix transpose

Matrix transpose, A [i] [j] becomes A [j] [i] is relatively simple, the code directly.

func transpose(A [][]int) [][]int {
    B := make([][]int, len(A[0]))
    for i := 0; i < len(A[0]); i++ {
        B[i] = make([]int, len(A))
        for j := 0; j < len(A); j++ {
            B[i][j] = A[j][i]
        }
    }
    return B
}