How to return from a forEach loop in Dart?

Question

I have this function

  bool nameExists(players, player) {
    players.forEach((f) {
      if (f.data['name'].toLowerCase() == player.toLowerCase()) {
        return true;
      }
    });

    return false;
  }

It always return false, even if the condition is satisfied.

Any ideas?

Answer 1

There is no way to return a value from forEach. Just use a for loop instead.

  bool nameExists(players, player) {
    for(var f in players) {
      if (f.data['name'].toLowerCase() == player.toLowerCase()) {
        return true;
      }
    }

    return false;
  }

Answer 2

For this specific use case, you can also use any() instead of forEach(), e.g.

bool nameExists(players, player) =>
  players.any((f) => f.data["name"].toLowerCase() == player.toLowerCase());