[Feature request] Mutate a list, for instance using list.update

[gifi]

Hi @renkun-ken ,
Thank you for this very helpful package!
I was wondering if there is any plan to add mutating capabilities in rlist. For instance, shouldn't be possible to list.update in-place ? e.g.: after doing this

yyy <- list(foo = list(a = 0, b = 1))
list.update(yyy, a = a + 10)

have the following as the result:
print(yyy)

$foo
$foo$a
[1] 10

$foo$b
[1] 1

[renkun-ken]

Thanks, I'm trying to work out something like this. It looks best to use Rcpp to handle this.

[gifi]

Hi,
Thanks for considering the proposition. I did my homework and, it turned out major changes would be required to overhaul the current rlist code base with a Rcpp-backend. My best wishes go to you when you'll decide to take on the task.

[KarolDaniluk]

It would be great, to have such feature. For example:

my_list <- list(
  a = list(m = 1, n = 1, foo = list(i = 1, j = 1)),
  b = list(m = 2, n = 2, foo = list(i = 2, j = 2)),
  c = list(m = 3, n = 3, foo = list(i = 3, j = 3))
)

test1 <- list.update(my_list, foo = unname(foo))
test2 <- list.update(my_list, foo2 = unname(foo))

working <- my_list %>% lapply(function(x) {x$foo = unname(x$foo); x})

In the object test1 foo is still named. However in test2, new element foo2 is unnamed.
It seems like list.update is not capable of updating object themselves.