def select

bend-collections@1.0.0.0 · src/crypto/secp256k1/limbs.bend:122

import Base

122def select(+b: Nat, xs: List<&2, Nat>, ys: List<&2, Nat>) -> List<&2, Nat>:
123  match xs ys:
124    case x <> xt y <> yt: pick1(b, x, y) <> select(b, xt, yt)
125    case _ _: Nil{}