with_seed = function(seed, expr) {
old_seed = get0(".Random.seed", globalenv(), mode = "integer", inherits = FALSE)
if (is.null(old_seed)) {
runif(1L)
old_seed = get0(".Random.seed", globalenv(), mode = "integer", inherits = FALSE)
}
on.exit(assign(".Random.seed", old_seed, globalenv()), add = TRUE)
set.seed(seed)
force(expr)
}
with_future = function(backend, expr) {
requireNamespace("future")
plan = future::plan()
on.exit(future::plan(plan))
future::plan(backend)
force(expr)
}
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