Dart| Flutter: Convert List of Dynamic into List of String examples

In Dart and flutter, this tutorial explains how to convert List<Dynamic> to List<String> and vice versa.

A dynamic type is a primitive type that may hold any dynamic value, such as an integer, a string, or a double.

Because a string is a primitive type that stores a collection of characters, automated conversion to/from dynamic is not possible.

You can check on How to convert dynamic to string and vice versa or vice versa in Dart and flutter.

#How to Convert List of String into List of Dynamic type in Dart

In dart and flutter, this example converts a list of strings to a list of dynamics.

• List has an array of strings.

• List. from() has a named constructor that takes a list of strings. It is a shallow copy of a list.

void main() {
  List<String> numbers = <String>['one', 'two', "four"];
  print(numbers.runtimeType);
  List<dynamic> dynamicValues = List<dynamic>.from(numbers);

  print(dynamicValues.runtimeType);
  print(dynamicValues);
}

Output:

JSArray<String>
JSArray<dynamic>
[one, two, four]

#How to parse List of Dynamic into List of String type in Dart

In dart and flutter, this example converts a list of dynamic types to a list of Strings.

map() is used to iterate over a list of dynamic strings. To convert each element in the map to a String, toString() is used. Finally, use the toList() method to return a list.

void main() {
  List<dynamic> numbers = <dynamic>['one', 'two', "four"];
  print(numbers.runtimeType);
  final List<String> strs = numbers.map((e) => e.toString()).toList();

  print(strs.runtimeType);
  print(strs);
}

Output:

JSArray<dynamic>
JSArray<String>
[one, two, four]

#Conclusion

Learned how to parse and convert a list of strings into a list of dynamic and vice versa.