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quiz-app's Issues

When there is no data. I am getting this error, please help to solve this.

I am using the ternary operator but it is throwing an error. please help me. I want to show No quiz data when there is no data available.

Capturem

E/flutter ( 7649): [ERROR:flutter/lib/ui/ui_dart_state.cc(166)] Unhandled Exception: RangeError (index): Invalid value: Valid value range is empty: 0
E/flutter ( 7649): #0 List.[] (dart:core-patch/growable_array.dart:166:60)
E/flutter ( 7649): #1 _QuizState.getQuestions (package:myquiz/screens/quiz.dart:48:33)
E/flutter ( 7649):
E/flutter ( 7649): #2 _QuizState.initState (package:myquiz/screens/quiz.dart:33:10)
E/flutter ( 7649): #3 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4684:58)
E/flutter ( 7649): #4 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4520:5)
E/flutter ( 7649): #5 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3490:14)
E/flutter ( 7649): #6 Element.updateChild (package:flutter/src/widgets/framework.dart:3258:18)
E/flutter ( 7649): #7 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5874:14)
E/flutter ( 7649): #8 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3490:14)
E/flutter ( 7649): #9 Element.updateChild (package:flutter/src/widgets/framework.dart:3258:18)
E/flutter ( 7649): #10 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4571:16)
E/flutter ( 7649): #11 Element.rebuild (package:flutter/src/widgets/framework.dart:4262:5)
E/flutter ( 7649): #12 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4525:5)
E/flutter ( 7649): #13 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4520:5)
E/flutter ( 7649): #14 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3490:14)
E/flutter ( 7649): #15 Element.updateChild (package:flutter/src/widgets/framework.dart:3258:18)
E/flutter ( 7649): #16 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5874:14)
E/flutter ( 7649): #17 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3490:14)
E/flutter ( 7649): #18 Element.updateChild (package:flutter/src/widgets/framework.dart:3258:18)
E/flutter ( 7649): #19 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5874:14)
E/flutter ( 7649): #20 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3490:14)
E/flutter ( 7649): #21 Element.updateChild (package:flutter/src/widgets/framework.dart:3258:18)
E/flutter ( 7649): #22 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4571:16)
E/flutter ( 7649): #23 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4719:11)
E/flutter ( 7649): #24 Element.rebuild (package:flutter/src/widgets/framework.dart:4262:5)
E/flutter ( 7649): #25 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4525:5)
E/flutter ( 7649): #26 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4710:11)
E/flutter ( 7649): #27 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4520:5)
E/flutter ( 7649): #28 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3490:14)
E/flutter ( 7649): #29 Element.updateChild (package:flutter/src/widgets/framework.dart:3258:18)
E/flutter ( 7649): #30 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5874:14)
E/flutter ( 7649): #31 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3490:14)
E/flutter ( 7649): #32 Element.updateChild (package:flutter/src/widgets/framework.dart:3258:18)
E/flutter ( 7649): #33 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5874:14)
E/flutter ( 7649): #34 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3490:14)
E/flutter ( 7649): #35 Element.updateChild (package:flutter/src/widgets/framework.dart:3258:18)
E/flutter ( 7649): #36 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4571:16)
E/flutter ( 7649): #37 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4719:11)
E/flutter ( 7649): #38 Element.rebuild (package:flutter/src/widgets/framework.dart:4262:5)
E/flutter ( 7649): #39 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4525:5)
E/flutter ( 7649): #40 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4710:11)
E/flutter ( 7649): #41 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4520:5)
E/flutter ( 7649): #42 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3490:14)
E/flutter ( 7649): #43 Element.updateChild (package:flutter/src/widgets/framework.dart:3258:18)
E/flutter ( 7649): #44 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4571:16)
E/flutter ( 7649): #45 Element.rebuild (package:flutter/src/widgets/framework.dart:4262:5)
E/flutter ( 7649): #46

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