The problem states that is will be a square grid of characters. However, one of the tests attempts to input a 3x4 grid.

JS/Javascript Solution, with 3 loops! Any improvement suggestions?

function gridChallenge(grid) {
    const orderedArr = grid.map(row => row.split('').sort().join(''));
    for (let i = 0;i< grid.length;i++) {
        for (let j = 0;j< grid.length - 1;j++) {
            if (orderedArr[j][i] > orderedArr[j+1][i]) {
                return "NO";
            }
        }
    }
    return 'YES';
}

Javascript

function gridChallenge(grid: string[]): string { // Write your code here const sorted_grid = grid.map(row => Array.from(row).sort())

for(let j=0; j<sorted_grid.length; j++){
    for(let i=0; i <sorted_grid.length-1; i++){
      if (sorted_grid[i+1][j] < sorted_grid[i][j]){
          return 'NO'
      }   
    }
}

return 'YES'

}

The problem description incorrectly uses the term ascending. Ascending is not the same as non-decreasing.

Test case 12 is invalid. The documentation says that its a square grid, but test case 12 has a 3x4 and 4x3 grid as the 2nd and 3rd test case:

3 3 abc lmp qrt 3 mpxz abcd wlmf 4 abc hjk mpq rtv