Javascript syntax to read values from json object

[cptutrecht]

Almost ready . Maybe one of the javascript guru's can help me again?

I added a checkbox to the list and need to enrich the listdata with a checkbox indicator and set it to standard value 'N'
After that want to the extra values to Y only for the checked rows

Have as code:

[COLOR=#2980b9]//first I add to every record in listdata an extra collumn 'isChecked',
//because that indicator is not in the output of the function getListData()[/COLOR]

var data = {dialog.object}.getListData('SIGNLIST');
var jsonchecked = {isChecked:'N'};

for (var i = 0; i < data.length; i++) {
A5.u.object.assign(data[i],jsonchecked);
}

[COLOR=#2980b9]//until here everything works ok
//Then I want to change the value of isChecked to Y for the checked rows[/COLOR]


var listObj = {dialog.object}.getControl('Signlist');

if (listObj) {
var checkedRows = listObj.getCheckedRows(); //according to documentation Returns an array of row number (zero based) of rows that are checked.
jsonchecked = {isChecked:'Y'};

if (checkedRows.length > 0) {
   for (var i = 0; i < checkedRows.length; i++) {

  var rowNum = checkedRows[i].[i]; [COLOR=#c0392b]// this syntax is wrong, here 'm stuck, how do i get the value of checked rows?[/COLOR]

   A5.u.object.assign(data[rowNum],jsonchecked,false);
   alert(rowNum); //just for testing
   }
}

[cptutrecht]

Solved, again with help from Jay,.

For documentation below the working code.
If one pushes after this code _listdata to the server by callback, there is a rowchecked indicator in _listdata on the server and not only the checked rows in _listinfo

[COLOR=#2980b9]//First we add a property isChecked with value "N" to the output of getListData()[/COLOR]


var data = {dialog.object}.getListData('SIGNLIST');
var jsonchecked = {isChecked:'N'};

for (var i = 0; i < data.length; i++) {
A5.u.object.assign(data[i],jsonchecked);
}

[COLOR=#2980b9]// Then we replace the value of isChecked with "Y" for the checked rows[/COLOR]

var listObj = {dialog.object}.getControl('SIGNLIST');

if (listObj) {
var checkedRows = listObj.getCheckedRows();
var msg = "Checked rows: ";
//var jsonCheckedRows = JSON.parse(checkedRows);
jsonchecked = {isChecked:'Y'};

if (checkedRows.length > 0) {
msg = "Checked rows: " + checkedRows.join(",");

[COLOR=#c0392b]checkedRows.forEach(updateCheckRows); //see: https://www.w3schools.com/js/js_array_iteration.asp
function updateCheckRows(value, index, array) {
var rowNum = value;
A5.u.object.assign(data[rowNum],jsonchecked,false);[/COLOR]

//alert(rowNum); just for testing
}

} else {
msg = "There are no checked rows.";//just for testig
}

A5.msgBox.show("Checked Rows ",msg,"o"); //just for testing
}