How to create a List of Dictionaries in Dart - Step by Step Examples

How to create a List of Dictionaries in Dart ?

Answer

In Dart, you can create a list of dictionaries using the `List` class for the outer list and `Map` class for the inner dictionaries.

✐ Examples

1 Create List of Dictionaries

In this example,

We create two inner dictionaries named dict1 and dict2 using the Map class.
We create an outer list named listOfDicts using the List class and initialize it with the inner dictionaries.
Finally, we iterate through the list of dictionaries and print each dictionary to standard output.

Dart Program

void main() {
  var dict1 = {'key1': 'value1', 'key2': 'value2'};
  var dict2 = {'key3': 'value3', 'key4': 'value4'};

  List<Map<String, String>> listOfDicts = [dict1, dict2];

  listOfDicts.forEach((dict) {
    dict.forEach((key, value) {
      print('\$key=\$value ');
    });
    print('');
  });
}

Output

key1=value1 key2=value2 
key3=value3 key4=value4

2 Create List of Dictionaries with Empty Inner Dictionaries

In this example,

We create an empty outer list named listOfDictsEmpty using the List class.
We create two empty inner dictionaries named dict3 and dict4 using the Map class.
We use the add method to add the inner dictionaries dict3 and dict4 to the outer list listOfDictsEmpty.
Finally, we iterate through the list of dictionaries with empty inner dictionaries and print each dictionary to standard output.

Dart Program

void main() {
  List<Map<String, String>> listOfDictsEmpty = [];

  var dict3 = {};
  var dict4 = {};

  listOfDictsEmpty.add(dict3);
  listOfDictsEmpty.add(dict4);

  listOfDictsEmpty.forEach((dict) {
    dict.forEach((key, value) {
      print('\$key=\$value ');
    });
    print('');
  });
}

Output

Summary

In this tutorial, we learned How to create a List of Dictionaries in Dart language with well detailed examples.

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How to create a List of Dictionaries in Dart - Step by Step Examples

How to create a List of Dictionaries in Dart ?

Answer

✐ Examples

1 Create List of Dictionaries

Dart Program

Output

2 Create List of Dictionaries with Empty Inner Dictionaries

Dart Program

Output

Summary

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