/// <summary>
/// Determines whether a sequence contains any elements.
/// </summary>
/// <param name="source">The <see cref="IBindableCollection{TElement}" /> to check for emptiness.</param>
/// <typeparam name="TSource">The type of the elements of <paramref name="source" />.</typeparam>
/// <returns>true if the source sequence contains any elements; otherwise, false.</returns>
public static IBindable <bool> Any <TSource>(this IBindableCollection <TSource> source)
{
source.ShouldNotBeNull("source");
return(source.Count()
.Switch()
.Case(count => count >= 1, true)
.Default(false)
.EndSwitch());
}
public PizzaCustomizer(Pizza pizza)
{
_pizza = pizza;
_availableToppings = _pizza.AvailableToppings
.AsBindable()
.Select(topping => new SelectableTopping(topping));
_selectedToppings = _availableToppings
.Where(selectableTopping => selectableTopping.IsSelected)
.Select(selectableTopping => selectableTopping.Topping);
_healthWarningMessage = _selectedToppings.Count()
.Switch()
.Case(0,
"Surely you would like more toppings?")
.Case(toppings => toppings >= 3,
"Too many toppings!")
.Default(
"Perfecto!")
.EndSwitch();
_totalPrice = _selectedToppings.Sum(topping => topping.Price).Project(toppingsTotal => toppingsTotal + pizza.BasePrice);
}
public PizzaCustomizer(Pizza pizza)
{
_pizza = pizza;
_availableToppings = _pizza.AvailableToppings
.AsBindable()
.Select(topping => new SelectableTopping(topping));
_selectedToppings = _availableToppings
.Where(selectableTopping => selectableTopping.IsSelected)
.Select(selectableTopping => selectableTopping.Topping);
_healthWarningMessage = _selectedToppings.Count()
.Switch()
.Case(0,
"Surely you would like more toppings?")
.Case(toppings => toppings >= 3,
"Too many toppings!")
.Default(
"Perfecto!")
.EndSwitch();
_totalPrice = _selectedToppings.Sum(topping => topping.Price).Project(toppingsTotal => toppingsTotal + pizza.BasePrice);
}
