Flutter Provider : cannot remove item from list in provider - flutter

Question

I have checkbox listtile inside listview builder I want when I check any one then its data add to list then when I uncheck it be removed from list:
Directionality(
textDirection: TextDirection.rtl,
child: ListView.builder(
itemCount: student.length,
itemBuilder: (context, index) {
return Card(
child: CheckBoxedListTile(
student[index], widget.date, widget.time,widget.teacher,widget.subject));
}),
),
);
}
}
check listtile widget is :
class _CheckBoxedListTileState extends State<CheckBoxedListTile> {
var checked;
#override
void initState() {
checked = false;
super.initState();
}
#override
Widget build(BuildContext context) {
return Consumer<AbsenceProvider>(builder: (context, absProv, child) {
return CheckboxListTile(
value: checked,
onChanged: (val) {
setState(() {
checked = !checked;
});
var data = {
"name": widget.student.name,
"stage": widget.student.stage,
"group": widget.student.group,
"teacher": widget.teacher,
"subject": widget.subject,
"date": widget.date,
"time": widget.time,
"vacs": "No"
};
if (checked == true) {
absProv.addAbs(data);
} else {
absProv.remAbs(data);
}
print(absProv.absences);
},
title: Text('${widget.student.name}'),
);
});
}
}
provider is :
class AbsenceProvider with ChangeNotifier {
var absences = [];
addAbs(item) {
absences.add(item);
notifyListeners();
}
remAbs(item) {
absences.remove(item);
notifyListeners();
}
}
when I click on check box it is add successfully
but when i click again it is nor remove it

Answer 1

I solved it by using removeWhere :
before :
absences.remove(item);
after :
absences.removeWhere((e) => e['name'] == item['name']);