CODEWITHSUNDEEP
flutterdart
Aleksander Barsukov
Aleksander Barsukov

Reputation: 39

Dart/Flutter How to access element of Map inside a list

How to access a Map element value by key, when a Map is inside a list?

'rooms': [
        {
          'roomNumber': 1,
          'roomBeds': 1,
          'roomColor': 1,
          'roomNumOfDwellers': 0,
          'roomDwellers': [
          ]
        },
        {
          'roomNumber': 2,
          'roomBeds': 3,
          'roomColor': 2,
          'roomNumOfDwellers': 0,
          'roomDwellers': [
          ]
        },
      ]

Tried this, doesn't work:

myPODO.rooms[1].['roomBeds']

The error message is:

Class '_InternalLinkedHashMap' has no instance getter 'roomBeds'. Receiver: _LinkedHashMap len:5 Tried calling: roomBeds

Upvotes: 0

Views: 6941

Answers (2)

GJJ2019
GJJ2019

Reputation: 5172

try to replace

myPODO.rooms[1].['roomBeds']

with

myPODO.rooms[1]['roomBeds']

Upvotes: 4

gegobyte
gegobyte

Reputation: 5545

Store the items in a list of Map and you can then print the values by key names.

void main() {

  List<Map<String, dynamic>> rooms = [
        {
          'roomNumber': 1,
          'roomBeds': 1,
          'roomColor': 1,
          'roomNumOfDwellers': 0,
          'roomDwellers': [
          ]
        },
        {
          'roomNumber': 2,
          'roomBeds': 3,
          'roomColor': 2,
          'roomNumOfDwellers': 0,
          'roomDwellers': [
          ]
        },
      ];

  print(rooms[1]['roomBeds']);
}

Upvotes: 3

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