Hi, I’m fairly new to GH and I could use some help trying to understand what components do internally. I thought I understood the main concepts like data trees, and what flattening / grafting / etc. so, but I have no explanation for results like this: [gh-screenshot-1] Could definitely use some…

Hi Component Confusion, Here is the best place to start with data trees..

I have read / watched a bunch of things about data trees already, but nothing that explains the output shown in my screenshot. More concretely then: Why does the “Addition” component remove null values? And why not all of them? (Only trailing ones, it seems) Why does the output of the “Flatten” f…

at a glance it looks like data tree management. Its always recommended that you post files, its quicker if we don’t have to recreate the file. Thanks [image] Help Us Help You Grasshopper Asking questions and getting answers is what this forum is all about. Al…

Added the file to the original post up top.

now you have me confused, why you adding text? The addition component does take various data types (vectors, ..) but text is not one of them. [image]

It’s because only your top line in the panel starts with text (aaa), the others don’t: unnamed.ghx (144.9 KB) Just for illustration purposes (you can streamline it a bit more): [image] [image] [image] component_confusion: I have read / watched a bunch of things about data trees already, bu…

Why strings? – Because I can :wink: No red lines + no runtime errors tells me: it’s allowed. I’m not trying to solve a real-world problem here (yet). – I want to understand GH’s internal logic in general (including quirks and edge cases), as I might need to implement custom components at some poin…

[image] component_confusion: I want to understand GH’s internal logic in general (including quirks and edge cases), Grasshopper has been around a while, there is a lot of documentation as well as examples, but even in this late part of cycle there are plenty of quirks & edge cases you will ne…

[image] component_confusion: @René_Corella Anything in particular I should read w.r.t. inputs? Sounds like I may have overlooked something. The indication from @Japhy (hovering over things) will do? I’m not good at explaining :stuck_out_tongue: However, perhaps similarly (?), feeding your d…

Adding strings together is not strange, but you could interpret this operation differently. What’s definitely strange is to expect that some values plus null is null. Null is not 0 or nothing. It means a (nullable) value or reference pointer is not set. It should throw an exception here, but GH1 was…

Need insights understanding component output

Grasshopper

Japhy (Japhy) December 17, 2025, 5:20pm 4

at a glance it looks like data tree management.

Its always recommended that you post files, its quicker if we don’t have to recreate the file. Thanks

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Need insights understanding component output

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