Append Values

Question

Hi,
I have a requirement to append the values of a particular computation to a local variable using append function 
The rule goes like this : 
a!localVariables(
local!data : {"x", "y", "z", },
local!finalValues,
a!forEach(
items: local!data,
expression: append(
local!finalValues,
performSomeComputation(fv!item)
)
)
)

now the problem is, the local variable is not getting updated no matter what, I tried using update dictionary as well as insert(local!finalValues, length(local!finalValues) + 1, fv!item) .. but still it wont append .. is there any other method I can use to append values ?

mikes0011 · Answer

You would need to define local!finalValues as the a!forEach() update sequence you try below.  Expression code can't and doesn't "push" a value into an already-defined variable (the only exception being on a form where saves are executed via user interaction) - instead you need to build the update into your definitions.  It can be a tricky paradigm to get used to, I admit, but once you get it, it's pretty easy to follow.

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