How to implement iterator for use with Angular Dart - iterator

Question

I'm adding Iterable functionality to a fork of enyo's csvparser.dart for use with Angular Dart. By adding a mixin, the CsvParser works with for..in loops, but fails ng-repeat with a "RangeError: value 0".
I'm doing something wrong by extending Iterator and the IterableMixin but I'm stuck.
stacktrace
RangeError: value 0
STACKTRACE:
#0 Iterator&IterableMixin.elementAt (dart:collection/iterable.dart:190)
#1 Scope.$watchCollection.<anonymous closure> (package:angular/core/scope.dart:397:60)
#2 relaxFnArgs2.<anonymous closure> (package:angular/utils.dart:49:47)
#3 Scope._digestHandleDirty (package:angular/core/scope.dart:613:24)
#4 Scope._digestComputeLastDirty (package:angular/core/scope.dart:564:36)
#5 Scope._digestWhileDirtyLoop (package:angular/core/scope.dart:489:52)
#6 Scope.$digest (package:angular/core/scope.dart:475:28)
#7 _autoDigestOnTurnDone (package:angular/core/scope.dart:153:14)
#8 _rootRun (dart:async/zone.dart:710)
#9 _ZoneDelegate.run (dart:async/zone.dart:440)
#10 NgZone._finishTurn (package:angular/core/zone.dart:91:21)
#11 NgZone._onRunBase (package:angular/core/zone.dart:56:43)
#12 _onRun (package:angular/core/zone.dart:61:15)
#13 _ZoneDelegate.run (dart:async/zone.dart:440)
#14 _CustomizedZone.run (dart:async/zone.dart:650)
#15 NgZone.run (package:angular/core/zone.dart:143:27)
#16 ngBootstrap (package:angular/bootstrap.dart:89:18)
#17 main (http://127.0.0.1:3030/staffing/web/main.dart:36:14)
csvparser.dart
class CsvParser extends Iterator with IterableMixin<CsvLineParser> {
...
Iterator<CsvLineParser> get iterator => this;
main.dart
#NgController(
selector: '[spreadsheet]',
publishAs: 'ctrl')
class SpreadsheetCtrl
{
// "first_name","last_name","company_name","address","city","county","state","zip","phone1","phone2","email","web"
String raw = '''
"James","Butt","Benton, John B Jr","6649 N Blue Gum St","New Orleans","Orleans","LA",70116,"504-621-8927","504-845-1427","jbutt#gmail.com","http ://www.bentonjohnbjr.com"
"Josephine","Darakjy","Chanay, Jeffrey A Esq","4 B Blue Ridge Blvd","Brighton","Livingston","MI",48116,"810-292-9388","810-374- 9840","josephine_darakjy#darakjy.org","http://www.chanayjeffreyaesq.com"
"Art","Venere","Chemel, James L Cpa","8 W Cerritos Ave #54","Bridgeport","Gloucester","NJ","08014","856-636-8749","856-264-4130","art#venere. org","http://www.chemeljameslcpa.com"
''';
CsvParser data;
SpreadsheetCtrl()
{
data = new CsvParser(raw);
}
}
class MyAppModule extends Module {
MyAppModule() {
type(SpreadsheetCtrl);
}
}
void main() {
ngBootstrap(module: new MyAppModule());
}
index.html
<div spreadsheet>
<table>
<tr ng-repeat="row in ctrl.data">
<td ng-repeat="col in row">
{{col}}
</td>
</tr>
</table>
...
<script type="application/dart" src="main.dart"></script>
test.dart
import 'web/csvparser.dart';
main()
{
String raw = '''
"first_name","last_name","company_name","address","city","county","state","zip","phone1","phone2","email","web"
"James","Butt","Benton, John B Jr","6649 N Blue Gum St","New Orleans","Orleans","LA",70116,"504-621-8927","504-845-1427","jbutt#gmail.com","http://www.bentonjohnbjr.com"
"Josephine","Darakjy","Chanay, Jeffrey A Esq","4 B Blue Ridge Blvd","Brighton","Livingston","MI",48116,"810-292-9388","810-374-9840","josephine_darakjy#darakjy.org","http://www.chanayjeffreyaesq.com"
"Art","Venere","Chemel, James L Cpa","8 W Cerritos Ave #54","Bridgeport","Gloucester","NJ","08014","856-636-8749","856-264-4130","art#venere.org","http://www.chemeljameslcpa.com"
''';
CsvParser data = new CsvParser(raw);
for(var row in data)
{
for(var col in row)
{
print('${col}, ');
}
}
}

Answer 1

It seems this doesn't work if the collection and the iterator are the same class (I don't know why).
Create an additional CsvIterator class and return an instance of CsvIterator in the implementation of CsvParser instead of this.
class CsvIterator extends Iterator<CsvLineParser> {
CsvParser data;
MyIterator(this.data);
... // implementation
}
class CsvParser extends Object with IterableMixin<CsvLineParser> {
...
Iterator<CsvLineParser> get iterator => new CsvIterator(this);
}