Dart .asMap()

In Dart, the .asMap() method is used to return an unmodifiable map view of a list where the keys are the indices and the values are the elements at those indices. This method is particularly useful when there is a need to work with list elements in a map-line manner, accessing them by their indices.

Syntax

newList.asMap()

• newList: The name of the list on which the .asMap() method is called.

Example

In this example, the .asMap() method is used to convert a list called names into a map:

void main() {
  List<String> names = ['Steve', 'Tonny', 'Jack', 'Jamie'];
  print('Original List: $names');

  // Converting the list into a map
  Map<int, String> nameMap = names.asMap();
  print('Map view of the list: $nameMap');
}

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Here is the output for the above example:

Original List: [Steve, Tonny, Jack, Jamie]
Map view of the list: {0: Steve, 1: Tonny, 2: Jack, 3: Jamie}

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Note: The resulting map remains immutable.