How to remove specific items from a list?

Question

How to remove items on List<ReplyTile> with id = 001.. ?

final List<ReplyTile> _replytile = <ReplyTile>[];

_replytile.add(
    ReplyTile(
        member_photo: 'photo',
        member_id: '001',
        date: '01-01-2018',
        member_name: 'Denis',
        id: '001',
        text: 'hallo..'
    )
);

Günter Zöchbauer · Accepted Answer · 2018-10-13T08:10:03.033

195

removeWhere allows to do that:

replytile.removeWhere((item) => item.id == '001')

See also List Dartdoc

edited Oct 13 '18 at 08:10

answered Oct 12 '18 at 11:37

Günter Zöchbauer

623,577
216
2,003
1,567

What if we have List . Can we remove dynamic added widget ? – Harsh Bhavsar Jan 22 '19 at 14:00
1

@HarshBhavsar not sure what you mean. Have you tried? What problem did you run into? – Günter Zöchbauer Jan 22 '19 at 14:05
https://stackoverflow.com/questions/54310614/remove-index-wise-customwidget-from-listwidget-in-flutter – Harsh Bhavsar Jan 22 '19 at 14:38
2

what if item.id == '001' is asynchronous? – Alex Roy Jun 15 '20 at 07:10
How could this be async? Is `id` an async getter? Using https://api.dart.dev/stable/2.8.4/dart-async/Stream/Stream.fromIterable.html, https://api.dart.dev/stable/2.8.4/dart-async/Stream/where.html, https://api.dart.dev/stable/2.8.4/dart-async/Stream/asyncMap.html should work: `Stream.fromIterable(replytile).asyncMap((item) async => {"item": item, "id": await item.id }).where((m) => m.id != '001').map((m) => m.item)).toList()`. Not tested and you might need to add some type annotations. – Günter Zöchbauer Jun 15 '20 at 07:34
stunning thanks, you just saved me – Delmontee Sep 22 '21 at 12:00
FYI. If you're working with a List array, then it will be: `replytile.removeWhere((item) => item["id"] == '001')` – Rob.Kachmar Apr 21 '23 at 14:59

score 32 · Answer 2 · answered Jan 07 '20 at 09:48

32

In your case this works:

replytile.removeWhere((item) => item.id == '001');

For list with specific datatype such as int, remove also works.Eg:

List id = [1,2,3];
id.remove(1);

answered Jan 07 '20 at 09:48

Suz'l Shrestha

887
9
9

2

listname.remove(item); Works very fine for me!! – blessing dickson Dec 11 '20 at 07:58

score 20 · Answer 3 · answered Jul 22 '21 at 15:21

//For removing specific item from a list with the attribute value
replytile.removeWhere((item) => item.id == '001') 

//Remove item by specifying the position of the item in the list
replytile.removeAt(2)   

//Remove last item from the list
replytile.removeLast()

//Remove a range of items from the list
replytile.removeRange(2,5)

score 7 · Answer 4 · answered Dec 16 '19 at 10:37

7

This also works

_listofTaskUI.removeAt(_quantity);

answered Dec 16 '19 at 10:37

SilenceCodder

2,874
24
28

score 0 · Answer 5 · answered May 07 '21 at 05:06

0

if you have a generic list

List<int> sliderBtnIndex = [];//Your list

sliderBtnIndex.remove(int.tryParse(index)); //remove

answered May 07 '21 at 05:06

gsm

2,348
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16

score 0 · Answer 6 · answered Mar 24 '23 at 08:02

Here the simple list functions with sample output

Consider the sample list

List sampleList = ["001", "002", "003"];

Here some add to list functions with output

//Add to list

  sampleList.add("004");
//Output: 001 002 003 004

//Add to specific index

  sampleList.insert(0, "005");
//Output: 005 001 002 003

Here the list remove functions with examples consider the same sample list

sampleList.removeWhere((item) => item.id == '003');
//Output: 001 002

//Remove item from secific index

  sampleList.removeAt(2);
//Output: 001 003

//Remove item from last

  sampleList.removeLast();
//Output: 001 002

//Remove items between range

  sampleList.removeRange(1, 2);
//Output: 002 003

How to remove specific items from a list?

6 Answers6

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