10.07 জেনেরিকের কিছু বাস্তব জীবনের উদাহরণ

class MyStack {
    final List _items = [];
    
    void push(T item) {
        _items.add(item);
    }
    
    T pop() {
        if (_items.isEmpty) {
            throw StateError('Cannot pop from an empty stack');
        }
        return _items.removeLast();
    }
    
    T peek() {
        if (_items.isEmpty) {
            throw StateError('Cannot peek into an empty stack');
        }
        return _items.last;
    }
    
    bool isEmpty() => _items.isEmpty;
    
    int size() => _items.length;
}
 

// Example usage of the generic stack
MyStack stringStack = MyStack();

stringStack.push("Dart");
stringStack.push("is");
stringStack.push("fun");

// Output: Peek: fun
print("Peek: ${stringStack.peek()}");
// Output: Size: 3
print("Size: ${stringStack.size()}");

// Output (without new lines):
// fun
// is
// Dart
while (!stringStack.isEmpty()) {
    print(stringStack.pop());
}