How to access CDT field by number ?

Question

Hi, 
 I'm surprised to have to ask this question, but could you tell me how to access the value of a CDT field giving a number please ? 
 I would need to use this kind of code : 
 local!value: field(local!vehicle, 1) /* where "1" is the first field of the row */ 
 a!localVariables(
 local!vehicle: rule!CJT2_GetVehiclesWithFilters(
 id: 1
 ).data[1],

 /* Here I just display some data with fieldname */
 property(local!vehicle, "id") & " - " & property(local!vehicle, "model")
 
 /* Now I would need to do the same thing, without using the fieldname, so I need a function that can do that
 I just tried to use the "property" function as an example but maybe is there any other function like "field" 
 or other ? */ 
 
 property(local!vehicle, 1) & " - " & property(local!vehicle, 2)
 field(local!vehicle, 1) & " - " & field(local!vehicle, 2)

) 
 
 Regards

ajhick · Answer

Never seen this use case but give this a go. Just out of interest, why access the field by a number? Not saying it's wrong I've just never come across a need to do this. 
 a!localVariables(
 local!data: {
 id: 31,
 make: "Ford",
 model: "F150",
 year: 2019,
 country: "Australia",
 insured: true
 },
 local!keys: a!keys(local!data),
 local!fieldNumbersToDisplay: {2,3,4,6}, /*Can play around with this for different field numbers*/
 local!fieldsToDisplay: index(
 local!keys,
 local!fieldNumbersToDisplay,
 {}
 ),
 concat(
 a!forEach(
 items: local!fieldsToDisplay,
 expression: concat(
 proper(fv!item),
 ": ",
 index(
 local!data,
 fv!item,
 {}
 ),
 if(
 fv!isLast,
 {},
 " | "
 )
 )
 )
 )
)

How to access CDT field by number ?

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