How to create a reusable expression that takes 2 parameters?

pieterk

A Score Level 1

over 7 years ago

I want to create a reusable expression that takes 2 parameters

ri!Errors (array of text)
ri!Error (text)

I want the xpression to check if the ri!Error already exists in the ri!Errors array. If it is already in the aray i want to return the original array. If it is not already in the array i want to add it and return the new array which will now include the new error.

Please look at the screenshot attached

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0 siddharthm over 7 years ago

Hi pieterk..try the below code -
if(
count(
wherecontains(
ri!Error,
ri!Errors
)
) > 0,
ri!Errors,
append(
ri!Errors,
ri!Error
)
)
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0 sparshs over 7 years ago

As suggested by siddharthm , use wherecontains to find the new error in already existing array and then use append or insert functions on error array to modify the data in it.
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0 bhanuprakashm over 7 years ago

Hi Pieterk,

Please check below code..it will solve your problem

load(
local!existingList:wherecontains(ri!error,ri!errors),
if(rule!APN_isEmpty(local!existingList),append(ri!errors,ri!error),{ri!errors})
)
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0 sikhivahans over 7 years ago

@pieterk The below one might be much simpler as per my knowledge:

fn!union(ri!Errors,{ri!Error})
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0 Mike Schmitt
Certified Lead Developer
over 7 years ago

Was about to suggest what @sikhvahans suggested: especially if the exact order of the error messages is unimportant, the union() function already does pretty much exactly what this use case needs.
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