New List Nodes

[chocolacodeParticipant]

Hey Gavalakis,

I am trying to create some nodes in FC for some List<T> methods, however I get stuck,

Can you please help to create some nodes for me: 🙂

RemoveAll(Predicate<T>)
Sort(Comparison<T>)
FindAll(Predicate<T>):List<T>
FindLast(Predicate<T>):T
LastIndexOf(T):Int

Thanks much in advance!!

[ktysdalParticipant]

Hi chocolacode, I’m going to try to answer this since it relates a bit to a question I asked a little while back.
If you make a list variable and then use it as a starting point to drag from the output, then you should see a list<Object> menu with all the nodes you need for that type.

You can see my original question here:
https://flowcanvas.paradoxnotion.com/topic/finding-object-in-a-list/
Gavalakis explained it well in that post.

Hope that helps.

[chocolacodeParticipant]

Hi ktysdal,

that is perfect!! Thanks for that!

now I need to figure out a way to create a type for the Predicate<T> and for the Comparison<T> so I can use them in the nodes I want. I have tried to add a Predicate Type and I find no way to do that…

One of my current challenges is that I have a List of Floats(approx 500 entries or could be more), I want a way to remove some of these entries by providing a search expression. I know that I can do a for loop to accomplish the same… but that will not be efficient. That is why I want to use the RemoveAll(Predicate<T>) . Now I can select that node, but I am stuck with the Predicate<T> type 🙁

If you can provide some help on that I will really appreciate..
Thanks !!

[chocolacodeParticipant]

Hey Ktysdal, Gavalakis,

Do you have any answer to my
Question above?

Thanks!!

[GavalakisKeymaster]

Hey,

A Predicate is a delegate, which basically a delegate is a pointer to a function. Unfortunately though, I would not recommend working with delegates in FlowCanvas because things can become very complicated quickly, since within FlowCanvas, support for assigning a method to a delegate is not supported (at least right now).

For what you are after, I would either recommend the typical for-loop approach, or even the creation of a custom node [LINK] that takes a list, processes it as you desire, and finally returns the processed list as an output.

Thanks.

[chocolacodeParticipant]

Hi Gavalakis,

Thanks for your answer!!

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