Hello!I'm having a doubt about the use of the function index(), as a best practice in Appian development.In the Appian documentation appears as: index( data, index, default ), but I know that we can use the function as: index( data, index, index, index... (as many as needed), default ), to navigate between an object and it returns the value needed.
The question is: Should I use nested index() functions? or Is better to use just one index function with many indexes inside?
Example:
{CountriesES, CountriesUS, CountriesNL} -> Cities -> Town
1 - Index(CountriesES, "Cities", "Town", null)
2 - Index(lIndex(CountriesES, "Cities", null), "Town", null).
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As far as I have explored the index function , Index(CountriesES, "Cities", "Town", null) could only be relevant to expression rule as it shows the below msg when we try to switch the expression mode to design mode in the interface.