string to array using "," code example
Example 1: javascript split
// bad example https://stackoverflow.com/questions/6484670/how-do-i-split-a-string-into-an-array-of-characters/38901550#38901550
var arr = foo.split('');
console.log(arr); // ["s", "o", "m", "e", "s", "t", "r", "i", "n", "g"]
Example 2: convert matrix string to matrix javascript
string = '[[1, 2], [3, 4], [5, 6]]'
string = JSON.parse(string)