How do I access elements in multi dimension array/list in Dart

Question

I am beginner in Dart. Following is an array and I need to access a specific element

'text': 'Rabbit'and 'score': 3

I tried the below:

_questions[1]['answers'][0]['text']['score']

This doesn't work.

var _questions = [
{
  'question': 'What is your color?',
  'answers': [
    {'text': 'Black', 'score': 10},
    {'text': 'Red', 'score': 5},
    {'text': 'Green', 'score': 3},
    {'text': 'White', 'score': 1},
  ],
},
{
  'question': 'What is your animal?',
  'answers': [
    {'text': 'Rabbit', 'score': 3},
    {'text': 'Snake', 'score': 11},
    {'text': 'Elephant', 'score': 5},
    {'text': 'Lion', 'score': 9},
  ],
},
];

luis.parravicini · Accepted Answer · 2019-10-07 12:20:36Z

1

(disclaimer: I don't know Dart!) I've played a bit with the code using dartpad.dartlang.org:

Cast the answer object as List:

var answers = (_questions[1]['answers'] as List);

And then you can the first object data as:

answers[0]['text']
answers[0]['score']

edited Oct 7, 2019 at 12:20

answered Oct 4, 2019 at 9:58

luis.parravicini

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3 Comments

John Wright Over a year ago

This doesn't work. It gives the error: The operator '[]' isn't defined for the class 'Object'.

John Wright Over a year ago

Thanks Luis. This works... so it means the child cannot be accessed directly.

luis.parravicini Over a year ago

Great. May be it can be accessed but I don’t know enough Dart to be sure about it. Please remember to accept the answer.

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