dart how to break forEach in if

Question

I want a list.forEach and if in forEach and when this if return true I want to break this code like that

  list.forEach((element){
       if(element == "a"){
         break
      }
    })

but it didn't help.

https://stackoverflow.com/q/65417146/ – jamesdlin Jan 25 '21 at 16:59 — jamesdlin, Jan 25 '21 at 16:59

julemand101 · Answer 1 · 2021-01-25T12:35:10.933

5

Rewrite your forEach call to a for-each loop:

  for (final element in list) {
    if (element == "a") {
      break;
    }
  }

edited Jan 25 '21 at 12:35

answered Jan 25 '21 at 12:13

julemand101

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The second version does not the same as the first though. – nvoigt Jan 25 '21 at 12:33
1

@nvoigt You are right. I have deleted my second "solution". – julemand101 Jan 25 '21 at 12:35

score 2 · Accepted Answer · answered Jan 25 '21 at 14:53

Real answer on a real question about how to break forEach in if.

void main() {
  final seq1 = [0, 1, 2];
  final result = <int>[];
  try {
    seq1.forEach((e) {
      if (e == 2) throw 'Stop this immediately';
      result.add(e);
    });
  } catch (e) {
    // What? Something happened?
  }

  print(result);
}

Result:

[0, 1]

Not the most practical option, but it works.
That is, fully functional, for your case (break forEach).
The answer fully answers your question.
Do you have any other question?

dart how to break forEach in if

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