with_jlview: Use a jlview object within a scope, releasing it on exit
In jlview: Zero-Copy Julia to R Array Bridge via ALTREP

with_jlview

R Documentation

Use a jlview object within a scope, releasing it on exit

Description

Creates a jlview object and ensures it is released when the scope exits, even if an error occurs. This prevents memory leaks from forgotten releases.

Usage

with_jlview(
  julia_array,
  expr,
  writeable = FALSE,
  names = NULL,
  dimnames = NULL
)

Arguments

`julia_array`	A JuliaObject referencing a Julia array
`expr`	An expression to evaluate with the jlview object bound to `.x`
`writeable`	Passed to `jlview`
`names`	Passed to `jlview`
`dimnames`	Passed to `jlview`

Value

The result of evaluating expr

Examples

## Not run: 
JuliaCall::julia_setup()
JuliaCall::julia_command("big = randn(100000)")
result <- with_jlview(JuliaCall::julia_eval("big"), {
    c(mean(.x), sd(.x))
})
# .x is automatically released here

## End(Not run)

jlview documentation built on March 24, 2026, 1:07 a.m.