How to Make an Array from every valid connected pin at a Select Node?

[XxNotAGamerxX]

I found this incomplete code that seems to make a loop by getting length of Enum.

1. Anyone know how to complete it - what connects to the -1/1 reroute pin?
   
   

How to properly loop through enumerations

[UnrealEditor_pHHzndPPhr] I’m used to do that in BP, works well

And what did he mean by making an extra (unused index) in the enum?