How can I retrieve this information as when I am testing it using print it is returning the following error?

I have searched online to try and find a solution but alas for the past 30 minutes i have not been able to find one. If there is an easier and more efficient way of storing information then please let me know.

Apologies as I am still learning dart, moving from JS.

List<Object> chosenSelection = [
    [
      'Advanced Higher', //[0][0]
      false /**Enabled? */, //[0][1]
      [
        'Style',
        'MelodyHarmony',
        'RhythmTempo',
        'TextureStructureForm',
        'Timbre',
      ] /**Categories */, //[0][2][0-4]
    ],//[0]
    [
      'Higher', //[0][0]
      false /**Enabled? */, //[0][1]
      [
        'Style',
        'MelodyHarmony',
        'RhythmTempo',
        'TextureStructureForm',
        'Timbre',
      ] /**Categories */, //[0][2][0-4]
    ]
  ];
  
  
  print(chosenSelection[0][0]); //Output: 'Advanced Higher'
  print (chosenSelection[0][2][4]); // Output 'Timbre'

Resulting error: type '_InternalLinkedHashMap<dynamic, dynamic>' is not a subtype of type 'List' of 'function result'

I am trying to access the data 'Advanced Higher' and then 'Timbre' within the variable.

CodePudding user response：

I'm not sure what's the question here, but this code doesn't compile for 2 reasons:

1. You're missing a closed bracket in the second print;
2. You're trying to access the elements of an Object as if it is a nested List.

CodePudding user response：

You are trying to implement a 2d and 3d list. But you have declared a 1d list.

In order to declare a 2d list you need to declare it as List<List<Object>> and for a 3d list: List<List<List<Object>>>

So you need to declare List<List<List<Object>>> chosenSelection, and then

print(chosenSelection[0][0]); //Output: 'Advanced Higher'
  print (chosenSelection[0][2][4]); // Output 'Timbre'