Dart - Common Collection Methods

void main() {
    // Declaring an empty list of coffees
    var coffees = [];
    
    // Declaring a list of teas with some values
    var teas = ['green', 'black', 'chamomile', 'earl grey'];
    
    // Checking if the 'coffees' list is empty and printing the result
    print(coffees.isEmpty); // Output: true (since the list is empty)
    
    // Checking if the 'teas' list is not empty and printing the result
    print(teas.isNotEmpty); // Output: true (since the list contains elements)
}

void main() {
    // Declaring a list of tea types
    var teas = ['green', 'black', 'chamomile', 'earl grey'];
    
    // Using the map() function to convert each tea name to uppercase
    var loudTeas = teas.map((tea) => tea.toUpperCase());
    
    // Iterating over the modified list and printing each tea name
    loudTeas.forEach(print); // Output: GREEN, BLACK, CHAMOMILE, EARL GREY
}

void main() {
    // Declaring a list of tea types
    var teas = ['green', 'black', 'chamomile', 'earl grey'];
    
    // Function to check if a tea is decaffeinated
    // Chamomile is the only decaffeinated tea in this list.
    bool isDecaffeinated(String teaName) => teaName == 'chamomile';
    
    // Using any() to check if at least one tea in the list is decaffeinated.
    print(teas.any(isDecaffeinated)); // Output: true (since chamomile is present)
    
    // Using every() to check if all teas in the list are decaffeinated.
    print(!teas.every(isDecaffeinated)); // Output: true (since not all teas are chamomile)
}