Question

How to find the number of sorted rows in a matrix with JavaScript

Answer 1

function isRowSorted(matrix, row) {
    const cols = matrix[0].length;
    
    for (let i = 0; i < cols; i++) {
        if (matrix[row][i - 1] > matrix[row][i]) {
            return false;
        }
    }
    return true;
}

const matrix = [[ 4,  7,  9, 14], 
                 [ 1,  8,  3,  4], 
                 [-9, -4, -3,  2], 
                 [-8, -3, -9,  4], 
                 [ 2,  6,  7, 24]];

const rows = matrix.length;
let count = 0;

for (let i = 0; i < rows; i++) {
    if (isRowSorted(matrix, i)) {
        count++;
    }
}

console.log("Total sorted rows: " + count);





/*
run:

"Total sorted rows: 3"

*/

 

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