The R6 package provides a type of class which is similar to R’s standard reference classes, but it is more efficient and doesn’t depend on S4 classes and the methods package
Questions tagged [r6]
181 questions
2
votes
0 answers
Can't override dynamically created method
Reproducible example:
Parent <- R6::R6Class(
"Parent",
lock_objects = FALSE,
public = list(
initialize = function() {
# I wan't to create many methods dynamically in the loop.
self[["foo"]] <- function() {
print('foo')
…
Paweł Chabros
- 2,349
- 1
- 9
- 12
2
votes
2 answers
Is there a way/method to assign a R6 object to an S4 object slot?
As the topic describes I am looking for a way to achieve this:
require("R6")
R6cls <- R6::R6Class("R6obj",
public = list(val = 1, foo = function() "foo!")
)
# check this R6 class
r6o <- R6cls$new()
r6o
#
# Public:
# clone: function…
GWD
- 1,387
- 10
- 22
2
votes
2 answers
Preserve the structure of R data frame upon modification (in tidy pipelines)
I am working with data frames of a certain structure. For the sake of example, they are all expected to have an identical set of columns and unique values of the "id" column. There is also a set of S3 generics and methods for this class of data…
Dmitry Zotikov
- 2,133
- 15
- 12
2
votes
1 answer
Link to R6 method from separate package in help pages and pkgdown
Cross posted from: https://community.rstudio.com/t/link-to-r6-method-from-separate-package-in-help-pages-and-pkgdown/134702
I'm currently writing an R package and would like to link to the help page for an R6 method in a separate package. The page I…
Jake Thompson
- 2,591
- 1
- 16
- 32
2
votes
1 answer
The fastest method to point an element in a nested list
Let's say we have an arbitrary size large nested list (the level of depth may exceed 100). The list contains objects (up to several thousand) in a non-predefined location in the list that we will need to see and modify often. Therefore, we keep a…
LordRudolf
- 63
- 8
2
votes
3 answers
Setting equivalent of .subset2 in R?
In R, I can use .subset2 to act as a [[ or $ without dispatch.
> a <- new.env()
> a$foo <- 3
> .subset2(a, "foo")
[1] 3
However, I can't seem to find an equivalent for the setting operation without dispatch:
> .subset2(a, "foo") <- 5
Error in…
Stefano Borini
- 138,652
- 96
- 297
- 431
2
votes
1 answer
How to correctly document R6 self
I have a function built with an R6class and was wondering the best way to pass devtools::check() is. Currently this repex gives the note
> checking R code for possible problems ... NOTE
obj_gen : : no visible binding for global variable…
Ben
- 89
- 7
2
votes
1 answer
Calling function of an R6 class within the initialize of R6
I am trying to build a reference implementation of our internal tooling for database connection boilerplate coding in R for other data scientists and data analyst
Our software developers made something similar to this in python:
class…
tfkLSTM
- 161
- 13
2
votes
1 answer
Access package-wide variable from within an R6 class
I am currently packaging up an API wrapper in R and found myself in a scenario in which I need to access a package-wide variable from within an R6 class (as it'll be used for a simple string concatenation). Below you can find an exemplification of…
anddt
- 1,589
- 1
- 9
- 26
2
votes
1 answer
How to select a subset of elements of the input R6 class within a shiny module to perform operations on them
Can I access a list of all input widgets within a module (let us name it myModule) and check if their state is isTruthy().
I found a way that works when I know (or can deduce) the exact names of the widgets (see 1).
All_Inputs <-…
Jan
- 4,974
- 3
- 26
- 43
2
votes
1 answer
R fable::model() "turn on" progress bar
How do I "turn on" the progress bar for slower model()s?
It seems to be an option according to development in fable and fabletools... but I can't turn it on.
Can someone please tell me what I am missing?
Sys.setenv(TZ =…
seapen
- 345
- 1
- 4
- 13
2
votes
1 answer
R R6 Inheritance with roxygen2 - class "ParentClass" is not exported by 'namespace:ParentPackage'
I am running into an issue with R6 inheritance. I am writing 2 packages (work related so I have to use fake code but I'll try to keep it accurate).
In ParentPackage, I define an R6 class ParentClass.
#' @name ParentClass
#' @title ParentClass…
gabagool
- 640
- 1
- 7
- 18
2
votes
1 answer
R shinyapp: renderUI does not work with nested modules R6 classes
I have a big shiny app with modules and I am converting some of these in R6 classes. All works well except for nested modules: I am facing an issue with namespaces and the uiOutput does not work.
Here is a reproductible example. The class ClassTest…
Samuel Wieczorek
- 23
- 3
2
votes
1 answer
How do document an S3 generic for an R6 class?
I have an R6 class myclass, and I have defined the S3 generic as.matrix for it. Everything works, but I'm getting 2 notes when I run R CMD check:
Note 1:
S3 methods shown with full name in documentation object 'as.matrix.myclass':
…
Kyle Ward
- 889
- 1
- 8
- 18
2
votes
1 answer
how to dispatch summary() method in R6 object
I am using R6 to build an object which fields includes a data frame and other informations.
I defined a first method $print() which I can call as obj1$print() or print(obj1) and both ways works just fine.
> obj1$print()
test object name: AA
>…
frenkg
- 23
- 4