convert value in string to array code example

Example 1: how to convert string to int a array in javascript

var a = "1,2,3,4";

var b = a.split(',').map(function(item) {
    return parseInt(item, 10);
});

Example 2: convert matrix string to matrix javascript

string = '[[1, 2], [3, 4], [5, 6]]'

string = JSON.parse(string)