Question about constans, proccess models, and expression

RE: Question about constans, proccess models, and expression

Stefan Helzle — Sun, 25 Jun 2023 07:33:40 GMT

This is exactly a case for which I recommend to NOT use a constant with multiple values. Why?

When not using any constants, your code would be like this:

if(local!value > 42, dothis, dothat)

When using a constant with multiple values, it is this:

if(local!value > cons!WHATEVER[7])

This does not make your code any more readable and still ties the functionality of your code to a hard coded value. In this case the index number.

My approach is:

- Create a constant for each value giving it a great name

- When a list of these values is needed, create an expression that creates that list.

You now have readable code and no dependencies on hard coded values

RE: Question about constans, proccess models, and expression

Mathieu Drouin — Sat, 24 Jun 2023 23:41:24 GMT

If I understood correctly, I think this is what you are looking for.

Essentially, if all the items in the array meet a condition, it returns true, otherwise false. If you only need 1 item to be true, simply change the and() for an or(). You can adjust the condition to whatever you require.

and(
  a!forEach(
    items: { 200, 200, 200 },
    expression: fv!item = 200
  )
)

RE: Question about constans, proccess models, and expression

Gustavo Silva — Sat, 24 Jun 2023 20:15:32 GMT

Hi, I tried a different solution I think I was not given the explanation of what I needed in the requirement, so I used something similar to this
assuming my constant is an array of 2 digits
{
8
9
}
cons!MY_CONSTANT_DEMO[1],
according to the option I needed, I only required the first item,
and well, I still appreciate your support.

RE: Question about constans, proccess models, and expression

Gustavo Silva — Sat, 24 Jun 2023 20:13:53 GMT

I tried with another solution where from the constant, sending it to call, I selected for example
assuming my constant has two values:
{
8
9
}, I needed the index of the first value, in this case
Cons!MY_CONSTANT_VALUE[1],

I think that for the requirements this is the solution that I needed... I still appreciate your support Stefan.

RE: Question about constans, proccess models, and expression

venkatrea696188 — Fri, 23 Jun 2023 09:24:52 GMT

a!foreach(
item:cons!constant,
expression:if(pv!data<fv!item, true(), false()) 
). Map these boolean result to some process variable use it else where for condtions

                          OR
{200}<{100,50} returns {true, true} map it to pv and use it elsewhere

RE: Question about constans, proccess models, and expression

sanchitg0002 — Fri, 23 Jun 2023 06:28:40 GMT

[quote userid="132237" url="~/discussions/f/general/29084/question-about-constans-proccess-models-and-expression"]

If(

cons!DATA_TO_EVAL,100," IS HIGHER"

)

[/quote]

What you are trying to do here? If you simply compare it just like how you did when it had single item i.e., Pv!evaluate<cons!DATA_TO_EVAL then also it will compare all items in that constant with pv and return list of boolean values.

RE: Question about constans, proccess models, and expression

Stefan Helzle — Fri, 23 Jun 2023 05:31:54 GMT

Did you consider to use a foreach to evaluate that process value against each of the values in the constant?