number os enclaves

function filterValidLands(allPositions, landPositions){
   return allPositions.length - landPositions.length;
}

function dfs(matrix, matrixR, matrixC, currentMove, visitedNodes, landPositions) {
    const [x, y] = currentMove.shift();
    const possibleMoves = [[x - 1, y],
                           [x, y -1],
                           [x + 1, y],
                           [x, y + 1]];
    for(let i = 0; i < 4; i++){
        const [moveX, moveY] = possibleMoves[i];
        if(moveX >= 0 && moveX < matrixR && moveY >= moveY && moveY < matrixC) {
            if (!visitedNodes[moveX][moveY]) {
                visitedNodes[moveX][moveY] = true;
                if(matrix[moveX][moveY] === 0)
                    continue;
                if(matrix[moveX][moveY] === 1) {
                    landPositions.push(true)
                    dfs(matrix, matrixR, matrixC, [[moveX, moveY]], visitedNodes, landPositions)
                }
            }
        }
    }
}


function isOnTheBorder(matrixR, matrixC, x, y) {
    return x === 0 || x === matrixR - 1 || y === 0 || y === matrixC - 1;
}

var numEnclaves = function(matrix) {
    let allPositions = [];
    let landPositions = [];
    const matrixR = matrix.length;
    const matrixC = matrix[0].length;
    const visitedNodes = matrix.map(x => x.map(() => false));
    for (let x = 0; x < matrixR; x++) {
        for (let y = 0; y < matrixC; y++) {
            if(matrix[x][y] === 0)
                continue;
             allPositions.push(true)
            if (!visitedNodes[x][y] && isOnTheBorder(matrixR, matrixC, x, y)) {
                visitedNodes[x][y] = true;
                landPositions.push(false)
                dfs(matrix, matrixR, matrixC, [[x, y]], visitedNodes, landPositions)
            }
        }
    }
    return filterValidLands(allPositions, landPositions)
}


console.log(numEnclaves(

    [[0,0,0,1,1,1,0,1,0,0],[1,1,0,0,0,1,0,1,1,1],[0,0,0,1,1,1,0,1,0,0],[0,1,1,0,0,0,1,0,1,0],[0,1,1,1,1,1,0,0,1,0],[0,0,1,0,1,1,1,1,0,1],[0,1,1,0,0,0,1,1,1,1],[0,0,1,0,0,1,0,1,0,1],[1,0,1,0,1,1,0,0,0,0],[0,0,0,0,1,1,0,0,0,1]]));