Dev study and notes

String sayHello(String name, int age, [String? country = 'Canada']) => "Hello, $name, You are $age, and you come from $country"; void main() { var results = (sayHello("lunch", 100)); print(results); } // PRINT // >>> // Hello, lunch, You are 100, and you come from Canada

String sayHello({String name = "NONE", int age = 0, String country = "NONE"}) { return "Hello, $name, You are $age, and you come from $country"; } String sayHelloRequired( {required String name, required int age, required String country}) { return "Hello, $name, You are $age, and you come from $country"; } void main() { print(sayHello(name: "lunch", age: 100, country: "Canada")); //NULL SAFE pri..

String sayHello(String name) { return "Hello, $name, Nice to meet you."; } // fat arrow sysntax ex1 String sayHelloFAS(String name) => "Hello, $name, Nice to meet you."; // fat arrow sysntax ex2 num add(num a, num b) => a + b; void main() { print(sayHello("lunch")); print(sayHelloFAS("lunch!!!")); print(add(1, 2)); } // PRINT // >>> // Hello, lunch, Nice to meet you. // Hello, lunch!!!, Nice to ..

String sayHello(String name) { return "Hello, $name, Nice to meet you."; } // fat arrow sysntax ex1 String sayHelloFAS(String name) => "Hello, $name, Nice to meet you."; // fat arrow sysntax ex2 num add(num a, num b) => a + b; void main() { print(sayHello("lunch")); print(sayHelloFAS("lunch!!!")); print(add(1, 2)); }

void main() { Set setNumbers = {1, 2, 3, 4}; setNumbers.add(1); setNumbers.add(1); setNumbers.add(1); setNumbers.add(1); print('setNumbers: $setNumbers'); List listNumbers = [1, 2, 3, 4]; listNumbers.add(1); listNumbers.add(1); listNumbers.add(1); listNumbers.add(1); print('listNumbers: $listNumbers'); var varIsSetNumbers = {1, 2, 3, 4}; varIsSetNumbers.add(1); varIsSetNumbers.add(1); varIsSetNu..

void main() { var player = { 'name': 'john', 'xp': 99.99, 'superpower': false, }; print('player: $player'); // Map mapPlayer = { 1: true, 2: false, 3: true, }; print('\nmapPlayer: $mapPlayer'); // Map listPlayer = { [1, 2, 3, 4]: true, [5, 6, 7, 8]: false, }; print('\nlistPlayer: $listPlayer'); // List listMapPlayers = [ { 'name': 'john1', 'xp': 123, }, { 'name': 'john2', 'xp': 12345, } ]; print..

void main() { var oldFriends = ['lunch', 'lynn']; var newFriends = [ 'andrew', 'john', for (var friend in oldFriends) ";D $friend", ]; print(newFriends); } // PRINT // >>> [andrew, john, ;D lunch, ;D lynn]

void main() { var name = 'lunch'; var thisYear = 2023; var greeting = '''Hello, Everyone, My name is $name, Nice to meet you. \'Next\' year is ${thisYear + 1}.'''; print(greeting); }

void main() { // List var giveMeFive = true; var numbers = [ 1, 2, 3, 4, if (giveMeFive) 5, ]; numbers.add(100); print(numbers); print(numbers.first); print(numbers.last); // >>> PRINT // [1, 2, 3, 4, 5, 100] // 1 // 100 }

void main() { String name = 'lunch'; print(name.length); // bool alive = true; print(alive.runtimeType); // int age = 100; print(age.isNaN); // double money = 99.9; print(money.round()); // num x = 12; //In Dart num ist int and double x = 1.1; print(x.hashCode); // }