CODEWITHSUNDEEP
listflutterdart
VegetaSaiyan
VegetaSaiyan

Reputation: 213

Printing the most frequent value in a text

Let's say I have a list of string.

I saw the code on: How to count items' occurence in a List

I want to print the most frequent string as a text in my widget. How do i run this and print it in there?

Do i go by void main() ?

class user with ChangeNotifier {
  static String topWord;

  notifyListeners();
}

void countWord() {
var elements = ["a", "b", "c", "d", "e", "a", "b", "c", "f", "g", "h", "h", "h", "e"];
  var popular = Map();

  elements.forEach((element) {
    if(!popular.containsKey(element)) {
      popular[element] = 1;
    } else {
      popular[element] +=1;
    }
  });

  print(popular);
return user.topWord = popular; 
}

Attached are some screenshots when I return the results

Error 1

Error 2

Upvotes: 0

Views: 370

Answers (1)

Chirag Bargoojar
Chirag Bargoojar

Reputation: 1214

Here you can first create the map of your counted values and then using that map you can get the maximum value of the key.

Source Here

class HomePage extends StatelessWidget {
  String email;
  var maxocc = maxOccurance();
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("App Bar"),
      ),
      body: Center(
        child: Container(
          child: Text(maxocc),
        ),
      ),
    );
  }
}

String maxOccurance() {
  var elements = [
    "a",
    "b",
    "c",
    "d",
    "e",
    "a",
    "b",
    "c",
    "f",
    "g",
    "h",
    "h",
    "h",
    "e"
  ];

  // Here creating map of all values and counting it
  final folded = elements.fold({}, (acc, curr) {
    acc[curr] = (acc[curr] ?? 0) + 1;
    return acc;
  }) as Map<dynamic, dynamic>;
  print(folded);

  // Here getting maximum value inside map
  final sortedKeys = folded.keys.toList()
    ..sort((a, b) => folded[b].compareTo(folded[a]));

  return "${sortedKeys.first} occurs maximun times i.e. ${folded[sortedKeys.first]}";
}

Output Here

output

Upvotes: 2

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