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  1. import 'dart:io';
  2.  
  3. void main() {
  4.   dynamic firstName = 'Nada';
  5.   dynamic lastName = ' abdelazim';
  6.   dynamic role = 'User'; 
  7.  
  8.   List<String> roles = ['Admin', 'User', 'Guest'];
  9.  
  10.   List<String> output = []
  11.     ..add((firstName ?? '') + ' ' + (lastName ?? ''))
  12.     ..add(roles.contains(role) ? role : 'Guest');
  13.  
  14.   print('Name: ${output[0]}');
  15.   print('Role: ${output[1]}');
  16. }
  17.  
  18.  
  19.  
Success #stdin #stdout 1.64s 133396KB
comments (?)
stdin 
Standard input is empty
stdout 
Name: Nada  abdelazim
Role: User
https://ideone.com/GF6Pjv
language:
Dart (dart 2.3.0)
created:
1 day ago
visibility:
public

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