Matrix Manipulation: Combining Submatrices in Go

package main

import (
    "fmt"
)

func SubmatrixConcatenation(matrixA, matrixB [][]int, submatrixCoords [2][4]int) [][]int {
    startRowA, endRowA := submatrixCoords[0][0]-1, submatrixCoords[0][1]-1
    startColA, endColA := submatrixCoords[0][2]-1, submatrixCoords[0][3]-1
    startRowB := submatrixCoords[1][0]-1, submatrixCoords[1][1]-1
    startColB, endColB := submatrixCoords[1][2]-1, submatrixCoords[1][3]-1

    numRows := endRowA - startRowA + 1

    resultMatrix := make([][]int, numRows)
    for i := 0; i < numRows; i++ {
        rowA := matrixA[startRowA+i][startColA : endColA+1]
        rowB := matrixB[startRowB+i][startColB : endColB+1]
        resultMatrix[i] = append(rowA, rowB...)
    }

    return resultMatrix
}

func PrintMatrix(matrix [][]int) {
    for _, row := range matrix {
        fmt.Println(row)
    }
}

func main() {
    matrixA := [][]int{
        {1, 2, 3, 4},
        {5, 6, 7, 8},
        {9, 10, 11, 12},
    }

    matrixB := [][]int{
        {11, 12, 13},
        {14, 15, 16},
        {17, 18, 19},
    }

    submatrixCoords := [2][4]int{
        {2, 3, 2, 3},
        {1, 2, 1, 2},
    }

    result := SubmatrixConcatenation(matrixA, matrixB, submatrixCoords)
    PrintMatrix(result)
}