Meaning of switch ONE and !ONE under Custom Functions

[Infinity]

Just detected the switches ONE and !ONE under the switch selection ring on the Custom Functions tab and do wonder now what's the meaning of them and what are typical use cases for that.
Any feedback on this is highly appreciated as I couldn't found any describtion of them by searching this forum nor by asking Dr. Google.
Thanks!

[Rob Thomson]

The Exclamation is a mathematical operator.

It means NOT or REVERSE.

So.. NOT this switch.

[Infinity]

Maybe I wasn't clear enough so let's give it a new try. !=negotiation is clear, but what kind of switch is ONE and what can I do with that?

[Kilrah]

ONE is triggered just once on model load.

Sent via mobile

[jhsa]

ONE is triggered just once on model load.

If that is the case then !ONE is a complete waste of space because it is automatically set when the model is loaded anyway and therefore not needed or am I missing something??

João

[Infinity]

Sorry, but that triggers my next question: "!ONE means <triggers continiously after model load>?" If this is the case (I have some doubt but no better negotiation for triggers just once), what is the difference between !ONE and ON?
I assume that you or one of the other developers had some typically use cases (scenarios) in their mind for !ONE and ONE. Can you tell me more about this?
If you know a web page which explains the background story, please feel free to reply the link instead of rewriting it.
Thanks!

[jhsa]

I use ONE for the voice to tell the model name everytime I load a model.. For example..
Custom functions:

One playtrack 151 --

This will play voice file number 151 when the model is loaded, being it when changing models or when turning the radio on with that model selected..

ONE if I'm not mistaken, will turn on only once for a period of time and then turn off again.. ON will be always on as the name says.. so whatever feature you are programming will be always active..

João

[Infinity]

Thanks Joao, makes perfect sense and a very good use case for ONE.

[jhsa]

I just thought of another possibility also using ONE and voice..
It would allow us, in case we have so many aircraft that we forget about some tricks, the voice to give a short description about that aircraft..
Basically the same as for the name.. I'm sure that if we keep thinking we will find a few more possibilities

João

[rdeanchurch]

Sorry, but that triggers my next question: "!ONE means <triggers continiously after model load>?" If this is the case (I have some doubt but no better negotiation for triggers just once), what is the difference between !ONE and ON?
I assume that you or one of the other developers had some typically use cases (scenarios) in their mind for !ONE and ONE. Can you tell me more about this?
If you know a web page which explains the background story, please feel free to reply the link instead of rewriting it.
Thanks!

The use of ONE is clear to me now.
But the !ONE is still obscure.

Does anyone have an example with explanation they could post please.

[Kilrah]

I don't think !ONE makes much sense, but the current menu system that still comes from the 9x and its severe memory restrictions does not allow skipping list items. So the "left", inverted list has to be the same as the "normal" one.
For example on the Taranis there are duplicate switches too (the 2 position-ones), !SF↓ is useless as it is the same as SF↑.

[Infinity]

Thanks Kilrah, that makes perfect sense from programming point of view, especially when you have to deal with memory limitations.
It's always great to get a good answer, although it may contain unexpected content, as you will have learned more anyway out of this.