how to change a string to an array in javascript code example

Example 1: javascript slice string from character

var input = 'john smith~123 Street~Apt 4~New York~NY~12345';

var fields = input.split('~');

var name = fields[0];
var street = fields[1];

Example 2: convert matrix string to matrix javascript

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

string = JSON.parse(string)