A minimal object oriented system in the spirits of Python's approach.
library(Emil)
obj = Emil$new()
obj$hello <- function (self) {
return("Hello World!")
}
obj$setX <- function (self,x) {
self$x=x
}
obj$getX <- function (self) {
return(self$x)
}
obj2=obj$new(x=6)
An example with documentation is as well embedded in the R package, see the file R/Accumulator.R for the R code and man/Accumulator-class.Rd and man/Accumulator_add.Rd for the generated documentation.
There is as well a package vignette which you should be able to see after
installation with vignette('emil-tutorial'). You can see the vignette code as well here: vignettes/emil-tutorial.Rmd.
R offers quite a few concepts of object oriented programming:
S3, S4,
R6,
RC,
R.oo,
proto and since
2022 as well R7. If you prefere a
system which closely follows Python conventions you can use Emil. The system implemented in around 50 lines of R code is similar to that of the
proto package, but much smaller, around 50 lines of code, making it easier to embed into your current
package or application.
In contrast to the non-standard packages listened above, R6, R7, R.oo, proto,
it is just a small single file implementation, to use this approach in your
own code you can simply copy the file R/Emil.R into your folder of R files
in your package folder and you can use this type of programming. The license,
MIT, is very permissive and does not require that you change your license if
you embed this file into your package, application etc.
You can as well use the Emil package like any other package using the
install.packages("Emil") approach once the package is on CRAN. Or in case of local R-scripts just source the file into your code as usually.
As package from Github:
install.packages("remotes")
remotes::install_github("mittelmark/Emil")
As package from CRAN:
install.packages("Emil")
Inside your own package:
- just copy the file
R/Emil.Rto your R source code folder
Inside your scripts, applications:
Just copy the code from R/Emil.R on top of your own code, or source the file
in your R script.
MIT see the file LICENSE
In case of bugs and suggestions, use the https://github.com/mittelmark/Emil/issues link on top.