list vs map in flutter code example

Example 1: dart list to map

var map1 = Map.fromIterable(list, key: (e) => e.name, value: (e) => e.age);

Example 2: dart list of maps

var orderLines = <Map>[]; // creates an empty List<Map>

orderLines.add({ 'number'  : '',
              'Item' : '',
              'Qty'  : ''
             });