In pak: Another Approach to Package Installation

#| include: FALSE
pkgload::load_all()

Create a tstoml object

Create a tstoml object from a string:

#| results: hide
txt <- r"(
# This is a TOML document

title = "TOML Example"

[owner]
name = "Tom Preston-Werner"
dob = 1979-05-27T07:32:00-08:00

[database]
enabled = true
ports = [ 8000, 8001, 8002 ]
data = [ ["delta", "phi"], [3.14] ]
temp_targets = { cpu = 79.5, case = 72.0 }

[servers]

[servers.alpha]
ip = "10.0.0.1"
role = "frontend"

[servers.beta]
ip = "10.0.0.2"
role = "backend"
)"
toml <- ts_parse_toml(text = txt)

Pretty print a tstoml object:

#| label: print-toml
toml

Select elements in a tstoml object

#| label: select-table
ts_tree_select(toml, "owner")

Select element(s) inside elements:

#| label: select-select
ts_tree_select(toml, "owner", "name")

Select element(s) of an array:

#| label: select-array
ts_tree_select(toml, "database", "ports", 1:2)

Select multiple keys from a table:

#| label: select-multiple
ts_tree_select(toml, "owner", c("name", "dob"))

Delete elements

Delete selected elements:

#| label: delete-elements
ts_tree_select(toml, "owner", "name") |> ts_tree_delete()

Insert elements

Insert a key-value pair into the document:

#| label: insert-pair-document
ts_tree_insert(toml, key = "new_key", "new_value")

Insert a key-value pair into a table:

#| label: insert-pair-table
ts_tree_select(toml, "owner") |> ts_tree_insert(key = "dpt", "Engineering")

Insert an element into an array:

#| label: insert-element-array
ts_tree_select(toml, "database", "ports") |>
  ts_tree_insert(10000L) |>
  print(n = 100)

Insert a new table into the document:

#| label: insert-table-document
ts_tree_insert(toml, key = "new_table", list(a = 1, b = 2)) |>
  print(n = 100)

Insert a new array of tables into the document:

#| label: insert-aot-document
ts_tree_insert(toml, key = "new_aot",
  list(list(x = 1), list(x = 2))) |>
  print(n = 100)

Update elements

Update an existing element:

#| label: update-element
ts_tree_select(toml, "title") |> ts_tree_update("A New TOML Example")

Update multiple elements at once:

#| label: update-multiple
ts_tree_select(toml, "servers", c("alpha", "beta"), "ip") |>
  ts_tree_update("192.168.1.23") |>
  print(n = 100)

pak documentation built on June 7, 2026, 9:06 a.m.