public void CanHaveManyComputeds()
{
var prefix = new Observable<string>("Before");
var contacts = new ObservableList<Contact>(
Enumerable.Range(0, 10000)
.Select(i => new Contact()
{
FirstName = "FirstName" + i,
LastName = "LastName" + i
}));
var projections = new ComputedList<Projection>(() =>
from c in contacts
select new Projection(prefix, c));
string dummy;
foreach (var projection in projections)
dummy = projection.Name;
Assert.AreEqual("BeforeFirstName3LastName3", projections.ElementAt(3).Name);
prefix.Value = "After";
foreach (var projection in projections)
dummy = projection.Name;
Assert.AreEqual("AfterFirstName3LastName3", projections.ElementAt(3).Name);
}
public void CanHaveManyComputeds()
{
var prefix = new Observable <string>("Before");
var contacts = new ObservableList <Contact>(
Enumerable.Range(0, 10000)
.Select(i => new Contact()
{
FirstName = "FirstName" + i,
LastName = "LastName" + i
}));
var projections = new ComputedList <Projection>(() =>
from c in contacts
select new Projection(prefix, c));
string dummy;
foreach (var projection in projections)
{
dummy = projection.Name;
}
Assert.AreEqual("BeforeFirstName3LastName3", projections.ElementAt(3).Name);
prefix.Value = "After";
foreach (var projection in projections)
{
dummy = projection.Name;
}
Assert.AreEqual("AfterFirstName3LastName3", projections.ElementAt(3).Name);
}
public void Initialize()
{
_model = new ContactList();
_model.AddContact(new Contact() { FirstName = "Charles", LastName = "Babbage" });
_model.AddContact(new Contact() { FirstName = "Alan", LastName = "Turing" });
_contactViewModels = new ComputedList<ContactViewModel>(() =>
from c in _model.Contacts
select new ContactViewModel(c)
);
}
public MediaCacheService(
CommuterApplication application,
Func<Queue, MediaDownloader> createMediaDownloader)
{
var mediaDownloaders = new ComputedList<MediaDownloader>(() =>
application.Root?.QueuedEpisodes.Select(e =>
createMediaDownloader(e))
.ToImmutableList() ?? ImmutableList<MediaDownloader>.Empty);
var dowloadersToStart = new Computed<ImmutableList<MediaDownloader>>(() =>
mediaDownloaders.Where(d => d.ShouldStart).ToImmutableList());
_subscribeToStart = dowloadersToStart.Subscribe(StartDownloaders);
}
public void Initialize()
{
_model = new ContactList();
_model.AddContact(new Contact()
{
FirstName = "Charles", LastName = "Babbage"
});
_model.AddContact(new Contact()
{
FirstName = "Alan", LastName = "Turing"
});
_contactViewModels = new ComputedList <ContactViewModel>(() =>
from c in _model.Contacts
select new ContactViewModel(c)
);
}
public void CanHaveManyPrecedents()
{
var contacts = new ObservableList<Contact>(
Enumerable.Range(0, 10000)
.Select(i => new Contact()
{
FirstName = "FirstName" + i,
LastName = "LastName" + i
}));
var sorted = new ComputedList<Contact>(() =>
from c in contacts
orderby c.FirstName, c.LastName
select c);
Assert.AreEqual("FirstName100", sorted.ElementAt(3).FirstName);
sorted.ElementAt(3).FirstName = "George";
Assert.AreEqual("FirstName1000", sorted.ElementAt(3).FirstName);
}
public void CanHaveManyPrecedents()
{
var contacts = new ObservableList <Contact>(
Enumerable.Range(0, 10000)
.Select(i => new Contact()
{
FirstName = "FirstName" + i,
LastName = "LastName" + i
}));
var sorted = new ComputedList <Contact>(() =>
from c in contacts
orderby c.FirstName, c.LastName
select c);
Assert.AreEqual("FirstName100", sorted.ElementAt(3).FirstName);
sorted.ElementAt(3).FirstName = "George";
Assert.AreEqual("FirstName1000", sorted.ElementAt(3).FirstName);
}
