Maps in Dart

Lesson#8

Maps are key-value pairs.

void main() {
  var capitals = { 
                    "Pakistan": "Islamabad",
                    "Afghanistan": "Kabul",
                    "Saudi Arabia": "Riyadh"
                };
  print(capitals); // {Pakistan: Islamabad, Afghanistan: Kabul, Saudi Arabia: Riyadh}
  print(capitals["Pakistan"]); // Islamabad
  print(capitals.keys); // (Pakistan, Afghanistan, Saudi Arabia)
  print(capitals.values); // (Islamabad, Kabul, Riyadh)

  capitals["India"]="New Delhi";
  print(capitals);  //  {Pakistan: Islamabad, Afghanistan: Kabul, Saudi Arabia: Riyadh, India: New Delhi}

  capitals.remove("India"); 
  print(capitals);  //  {Pakistan: Islamabad, Afghanistan: Kabul, Saudi Arabia: Riyadh}

  capitals.clear();
  print(capitals); // {}
      
}

Maps