kwalrath

This exercise looks tricky, but it's really one big `try` statement.
Just call `untrustworthy` inside the `try`, and then use `on`, `catch`,
and `finally` to catch exceptions and call methods on the logger.

kwalrath

Use the methods `map()`, `any()`, and `where()` to solve the exercise.

kwalrath

Use map to create a String with the user.name and the user.age 

kwalrath

main() {
  var numbersByTwo = [1, -2, 3, 42].map((number) => number * 2);
  print('Numbers: $numbersByTwo.');
}

kwalrath

Use the `where` method to implement the filters.

kwalrath

main() {
  var numbers = [1, 3, -2, 0, 4, 5];

  var numbersUntilZero = numbers.takeWhile((number) => number != 0);
  print('Numbers until 0: $numbersUntilZero');

  var numbersAfterZero = numbers.skipWhile((number) => number != 0);
  print('Numbers after 0: $numbersAfterZero');
}

kwalrath

main() {
  var evenNumbers = [1, -2, 3, 42].where((number) => number.isEven);

  for (var number in evenNumbers) {
    print('$number is even.');
  }

  if (evenNumbers.any((number) => number.isNegative)) {
    print('evenNumbers contains negative numbers.');
  }

kwalrath

Use the methods `any` and `every` to compare the user age.

kwalrath

void main() {
  var items = ['Salad', 'Popcorn', 'Toast'];
  
  if (items.any((element) => element.contains('a'))) {
    print('At least one element contains "a"');
  }
  
  if (items.every((element) => element.length >= 5)) {
    print('All elements have length >= 5');
  }

kwalrath

Use the methods `contains` and `startWith` from the `String` class.