Rand.swap: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/src/math/random/rand.bend as Rand
Lines 277-279 of bend-collections-laws-crypto@1.0.0.0/src/math/random/rand.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/src/math/random/rand.bend&start_line=277&end_line=279

import Base

# exchange elements i and j (unchanged when either is out of range)
def swap(-A: Data, +xs: List<&2, A>, +i: Nat, +j: Nat) -> List<&2, A>:
  swap_m(A, xs, i, j, nth(A, xs, i), nth(A, xs, j))

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=Nat
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/math/random/rand.bend&name=nth
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/math/random/rand.bend&name=swap_m