Flutter remove item from List of maps read-only error

Question

I want to remove an item from my list in a ListView.builder but it's saying it's read only.

List<Map> entries = [{'date': '2019-08-10', 'data': 85.0}, {'date': '2019-08-14', 'data': 84.0}];

onPressed: () {
  removeItem(index);
}

void removeItem(index) {
  entries.removeAt(index);
}

Another exception was thrown: Unsupported operation: read-only

This does not work either:

onPressed: () {
  removeItem(date);
}

void removeItem(date) {
  entries.removeWhere((item) => item['date'] == date);
}

If you change `List` to something else say `List entries = [1,2]`, do you still get the error? — CopsOnRoad, Aug 14 '19 at 12:17
@CopsOnRoad It seems not, no error if it's just a list of ints. — Hasen, Aug 14 '19 at 12:22

score 5 · Answer 1 · answered Oct 17 '20 at 19:27

5

I got the solution from this, the link

entries = List.from(entries)..removeAt("theIndexValue");

answered Oct 17 '20 at 19:27

balaji b r k

65
2
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Flutter remove item from List of maps read-only error

1 Answers1