topic Re: property expressions, "NONE" or jump to next Line in Collaboration with other software

property expressions, "NONE" or jump to next Line

Lukas Oelmueller — Wed, 16 Jan 2019 09:39:29 GMT

Does anyone know a good way to jump into a new expression line (Add button)?
Case:
IF Typ is a wall show a wall-value If Not jump into next calculation.
I tried "None" but it won't work in all of the cases

I need this to shorten the expressions an keep a good overview.

Re: property expressions, "NONE" or jump to next Line

Eduardo Rolon — Wed, 16 Jan 2019 11:38:28 GMT

That might be helpful,

AFAIK you might achieve that by placing each item in the Sequence section of Properties. The trick is that the sequence gives a result then it will stop there so you have to be creative on how to line them up.

For example if you a particular expression will work if it goes conceptually as this:

- If Category is Wall do this
- If Category is Slab do this
- If Category is Roof do this

In this case the expression will only give a result as long as the object has one of those categories. If the object has 2 of them then it will only give the first one that applies in the sequence.

So if the sequence is this:

- If Category is Wall do this
- If Category is Wall ALSO do this

You will never get to the second line.

Re: property expressions, "NONE" or jump to next Line

Lukas Oelmueller — Wed, 16 Jan 2019 12:31:08 GMT

Thanx eduardo,

I figured that out to so far. For the expression I'm working on it would be of much help to have a "jump" option.
Tried many workarounds, but none of them really work...

Guess I'll have to wait for an update one day....

Thanks for the clear answer.

Lukas

Re: property expressions, "NONE" or jump to next Line

poco2013 — Wed, 23 Jan 2019 06:29:12 GMT

FYI:

If you are using a sequence, you do not necessarily have to use if statements.
You can take advantage of the fact that Archicad will error check the statement beforehand for the applicability of the properties to the element selected.
If any property within the statement is not applicable, it will not try to do the statement but will skip to the next sequence.
So just use the calculation line applicable and Archicad will decide if it is valid for that type element.

The problem that you may get into is if you want to use the expression for different types which may have common properties like doors and windows. In that case use a empty property classified only for the element type of interest -- within the false return of a single line if statement.

This approach creates a single line statement for each element type. So you can use one expression for several different types (one sequence for each element type) without resorting to chaining ifs.

Re: property expressions, "NONE" or jump to next Line

Lukas Oelmueller — Wed, 23 Jan 2019 08:42:10 GMT

thanks poco, in my case i need the if to ask for the classification...so i cant go without an "else". I would need a jumper property for each classification.......not to happy with this workaround

Re: property expressions, "NONE" or jump to next Line

Red — Sun, 28 Feb 2021 20:58:00 GMT

lukaso wrote:
thanks poco, in my case i need the if to ask for the classification...so i cant go without an "else". I would need a jumper property for each classification.......not to happy with this workaround

I assume there still isn't a feature as an ELSE?

Re: property expressions, "NONE" or jump to next Line

Lukas Oelmueller — Sun, 28 Feb 2021 21:16:27 GMT

I assume there still isn't a feature as an ELSE?

No there isn't. But there is IFS now (it has no ELSE at all)

By the way, I'm totally happy with the workflow poco explained.

Re: property expressions, "NONE" or jump to next Line

MrFlaws — Thu, 01 Sep 2022 10:18:54 GMT

Hi poco2013, thanks for your response here. I too am having the same query as lukaso and wanted clarification on this point. do you mean to use the function below and leave the ValueIfFalse entry blank?

IF ( Logical, ValueIfTrue, ValueIfFalse )

I am not clear how I would be able to filter the elements (eg. windows) by their property value (eg. sliding, top hung, ... etc) without using the IF or IFS function.

Thanks

Femi