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    RolandPheasant on UniqueChangeSet

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    glennawatson on master

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Gitter
@ReactiveGitter
[unknown]
[RolandPheasant/DynamicData] Issue created by gdurand
RolandPheasant/DynamicData#129
Currently you cannot refresh a cache filtered with a static predicate.
An overload Filter(Func<TObject, bool> filter, IObservable<Unit> reapplyFilter) could be useful.
Gitter
@ReactiveGitter
[roland, Reactive, Inc.] @gdurand does 'ProjectService.GetDomains()' return all possible domains?
Gitter
@ReactiveGitter
[unknown]
[RolandPheasant/DynamicData] New comment by onliner10 on pull request #126: Use LinkedLists in IndexCalculator, optimise algorithm
I managed to fix algorithm to handle refreshes, therefore fixing failing test
Renato Marinho
@renatomarinho
This message was deleted
Logan Laughlin
@llaughlin
image.png
Hello everyone. I'm not sure what I might be doing wrong, but each time I try to add Dynamic Data to a Linqpad script, I get this error:
I've tried manually installing System.Reactive 3.1.1, but I get a similar error:
image.png
I've read that this is supposed to be solved in some versions of nuget/system.reactive/dynamicdata, sometimes with the instructions to change to "PackageReference" for .csproj files, but I'm using Linqpad, not .csproj. I'm more concerned that there any issues that explain workarounds for this, as DynamicData still has a dependency on System.Reactive 3.1.1
Jeremy Kolb
@kjeremy
is there a way to transform a property from a IObservableCache to a IObservableList? I want to do something like: (
IObservableList<string> myList = this.SensorCache.Connect()
                .DistinctValues(s => s.Group) // Find distinct values of "Group" property
                .Filter(group => !string.IsNullOrEmpty(group)) // Filter and sort
                .Sort(Comparer<string>.Default)
               .ToObservableList() // doesn't exist, closest I can find is Bind
Jeremy Kolb
@kjeremy
maybe the correct question is how to go from IObservable<IChangeSet<X, Y>> to IObservable<ChangeSet<Y>>
Jozef Hollý
@j2ghz
@kjeremy .RemoveKey()
IObservable<IChangeSet<TObject>> RemoveKey<TObject, TKey>(this IObservable<IChangeSet<TObject, TKey>> source)
Jeremy Kolb
@kjeremy
Thanks! Now I can remove a bunch of ReadOnlyObservableCollection
Jozef Hollý
@j2ghz

Is there a method that works like IEnumerable's SingleOrDefault? I am looking for IObservable<IChangeSet<T>>.SingleOrDefault<T> that would return IObservable<T>.

I have a SourceList<item>, and I need a IObservable<bool> that says whether a defined item is present in the collection. With LINQ I'd do .Contains(), but a reactive equivalent seems to be missing. I could use .Filter(), but then .SingleOrDefault equivalent is still needed. Am I missing something?

Jozef Hollý
@j2ghz
While I think this operator would be useful, I solved it when I realized (Left)Join can be used if it's a cache, not a list.
Roland Pheasant
@RolandPheasant
@/all for those who do not already know, the forum has moved to here https://reactiveui.net/slack. If you have problems getting access please DM your email address to me and I will send an invite.
vanessa jese
@vanessajese2_twitter
hello
Jonas Jermann
@jjermann
hi, given a SourceList, how do I get an observable property of e.g. list.FirstOrDefault(x => x.SomeCondition())?
Or alternatively is there some observable I can subscribe to that always changes when anything of the SourceList changes?
Usman Waheed
@Usman_Waheed_KH_twitter
connetionString.Close();
LiveCharts.Wpf.Axis ax = new LiveCharts.Wpf.Axis()
{
Title = "Period Name",
ShowLabels = true,
FontWeight = System.Windows.FontWeights.Bold,
                Foreground = new SolidColorBrush(Colors.Black),
                Labels = LabelsX,
            };
I am trying to print the List of years coming from database
but the problem is it always gives a difference of 2 year
2010 ---> 2012 on x axis
i don't know how can i set the labels
so it will not miss any year
Glenn
@glennawatson
@/all for those who do not already know, the forum has moved to here https://reactiveui.net/slack.