nodejs two dimentional for loop code example

Example 1: nested array loop in javascript

let chunked = [[1,2,3], [4,5,6], [7,8,9]];

for(let i = 0; i < chunked.length; i++) {
  
   for(let j = 0; j < chunked[i].length; j++) {
     
      console.log(chunked[i][j]);
   }
}

Example 2: javascript create 2d array

function create2DArray(rows, columns, value = (x, y) => 0) {
  var array = new Array(rows);
  for (var i = 0; i < rows; i++) {
    array[i] = new Array(columns);
    for (var j = 0; j < columns; j++) {
      array[i][j] = value(i, j);
    }
  }

  return array;
}

var array = create2DArray(2, 3, (row, column) => row + column);
console.log(array);
//output: [[0, 1, 2],
//         [1, 2, 3]]