ProofBsearch.bq.pre: def of bend-osdev-algo@0.1.0.0
Import: import bend-osdev-algo@0.1.0.0/proof_bsearch.bend as ProofBsearch
Lines 31-34 of bend-osdev-algo@0.1.0.0/proof_bsearch.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-algo@0.1.0.0/proof_bsearch.bend&start_line=31&end_line=34

import Base

# the searched prefix, its lower bound, and the range's size and middle as
# Nats
def bq.pre(+l: List<&2, U32>, +n: U32) -> List<&2, U32>:
  List.take(&2, U32, l, U32.to_nat(n))

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.take
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.to_nat