def lookup
import bend-ml-autograd@0.1.1.0/main.bend as BendMlAutogradimport Base
135def lookup(env: List<&2, F32>, +i: Nat) -> F32:
136 match env i:
137 case Nil{} _:
138 0.0
139 case Con{h, t} 0n:
140 h
141 case Con{h, t} 1n+p:
142 lookup(t, p)