How to find out the length of the longest row and column of a 2d array?

Question

JavaScript

Hello, please tell me how to pass the length (length) of the largest subarray from the val array to the testFunc() function, and, if possible, the length of the largest column (for example, a column with index 1 - 7, "", 9). The number of subarrays is unknown.

var val = [
["",7,17,27,17],
["","",18,28,18,18,18,18,18],
["",9,19,29,19]
]

var newVal = val.map(function(e) {
  return testFunc();
});

Answer 1

The task is simple. For each line, calculate the number of elements, drive it into an array and look for the maximum in this array. The index of the largest value will be equal to the index of the longest string. Clear and simple.