with_connection: Connections which close themselves

In withr: Run Code 'With' Temporarily Modified Global State

Connections which close themselves

Description

R file connections which are automatically closed.

Usage

with_connection(con, code)

local_connection(con, .local_envir = parent.frame())

Arguments

con	For with_connection() a named list with the connection(s) to create. For local_connection() the code to create a single connection, which is then returned.
code	[any] Code to execute in the temporary environment
.local_envir	⁠[environment]⁠ The environment to use for scoping.

Value

[any]
The results of the evaluation of the code argument.

See Also

withr for examples

Examples

with_connection(list(con = file("foo", "w")), {
  writeLines(c("foo", "bar"), con)
})

read_foo <- function() {
  readLines(local_connection(file("foo", "r")))
}
read_foo()

unlink("foo")

withr documentation built on Oct. 28, 2024, 5:07 p.m.