| Title: | Execute Expensive Operations Only Once |
| Version: | 0.4.1 |
| Description: | Allows you to easily execute expensive compute operations only once, and save the resulting object to disk. |
| License: | MIT + file LICENSE |
| Encoding: | UTF-8 |
| RoxygenNote: | 7.1.1 |
| Imports: | magrittr (≥ 2.0.3) |
| URL: | https://gdmcdonald.github.io/once/ |
| NeedsCompilation: | no |
| Packaged: | 2022-08-31 00:28:10 UTC; gordon |
| Author: | Gordon McDonald 
[aut, cre] |
| Maintainer: | Gordon McDonald <gordon.mcdonald@sydney.edu.au> |
| Repository: | CRAN |
| Date/Publication: | 2022-08-31 19:20:06 UTC |
Pipe operator
Description
See magrittr::%>% for details.
Usage
lhs %>% rhs
Arguments
lhs |
A value or the magrittr placeholder. |
rhs |
A function call using the magrittr semantics. |
Value
The result of calling rhs(lhs).
Execute Expensive Operations Only Once
Description
The once() function allows you to easily execute expensive compute operations only once, and save the resulting object to disk.
Usage
once(expr, file_path = NULL, rerun = FALSE)
Arguments
expr |
The expensive expression to evaluate |
file_path |
File path for saving the output object as an Rds file. Note that if no file name is provided it will not save! |
rerun |
Rerun the expression anyway and save the result? Defaults to false. |
Value
the results of expr
Examples
save_file <- tempfile(fileext = ".Rds")
# temporary file path - replace with your preferred saved file path
my_out <-
runif(1e8) %>% # some expensive operation
mean() %>%
once(file_path = save_file)
# only do it once, save output to this file.