Max value of a multidimensional array javascript

Question

I have a multidimensional array of x columns and y rows. How can I find the min and the max value of the matrix? Example:

[[1,  37.8, 80.8, 41.8],
[2,  30.9, 69.         


        

Answer 1

let

var arr = [[2,3], [4,5]]; // a multidimensional array

then get an array with each row's maximum with

var maxRow = arr.map(function(row){ return Math.max.apply(Math, row); });

and the overal maximum with

var max = Math.max.apply(null, maxRow);