miquelbeltran

Use the `where` method to implement the filters.

miquelbeltran

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');
}

miquelbeltran

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.');
  }

miquelbeltran

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

miquelbeltran

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');
  }

miquelbeltran

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

miquelbeltran

bool predicate(String element) {
  return element.length > 5;
}

main() {
  var items = ['Salad', 'Popcorn', 'Toast'];

  // You can find with a simple expression:
  var element1 = items.firstWhere((element) => element.length > 5);
  print(element1);

miquelbeltran

void main() {
  var iterable = ['Salad', 'Popcorn', 'Toast'];
  print('The first element is ${iterable.first}');
  print('The last element is ${iterable.last}');
}

miquelbeltran

void main() {
  var iterable = ['Salad', 'Popcorn', 'Toast'];
  for (var element in iterable) {
    print(element);
  }
}

miquelbeltran

Let's do a Hello World