Displaying 2 results from an estimated 2 matches for "s7_dispatch".
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2023 Mar 08
1
Augment base::replace(x, list, value) to allow list= to be a predicate?
...le switch in the body of the function, and
wouldn't work well as an anonymous function.
Multiple dispatch can nicely encompass both of these cases. For replace(),
library(S7)
replace <- new_generic("replace", c("x", "list"), function(x, list,
values, ...) {
S7_dispatch()
})
method(replace, list(class_any, class_any)) <- base::replace
method(replace, list(class_any, class_function)) <- function(x, list,
values, ...) {
replace(x, list(x, ...), values)
}
x <- c(1 ,2, NA, 3)
replace(x, is.na(x), 0)
[1] 1 2 0 3
replace(x, is.na, 0)
[1] 1 2 0 3
And for...
2023 Mar 07
1
Augment base::replace(x, list, value) to allow list= to be a predicate?
This could be extended to sub and gsub as well which gsubfn in the
gusbfn package already does:
library(gsubfn)
gsubfn("^..", toupper, c("abc", "xyz"))
## [1] "ABc" "XYz"
On Fri, Mar 3, 2023 at 7:22?PM Pavel Krivitsky <p.krivitsky at unsw.edu.au> wrote:
>
> Dear All,
>
> Currently, list= in base::replace(x, list, value)