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.
Examples
with_connection(list(con = file("foo", "w")), {
writeLines(c("foo", "bar"), con)
})
read_foo <- function() {
readLines(local_connection(file("foo", "r")))
}
read_foo()
#> [1] "foo" "bar"
unlink("foo")
