Using values stored in an array

Hello and thank you for this awesome plugin.

I’m trying to use values I’ve created in a previous field:

First field (fieldname18): 

(function() {

// ... 

var resultat_A0 = [pourcentage_A0, reponse_correcte_A0, reponse_incorrecte_A0, sans_reponse_A0];

return resultat_A0;

}

)();

Second field: 
(function() {

  var result = fieldname18;
  return result; 
}
)();

The “result” of the second function only gives the first value in the array, and not the others. What am I doing wrong?

Thanks a bunch.