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31 lines
869 B
R
31 lines
869 B
R
# Run a function caching the result on the file system.
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#
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# The function will be called with the appended arguments. The [`id`] argument
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# will be used to identify the cache file on the file system and in log
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# messages.
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run_cached <- function(id, func, ...) {
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if (!dir.exists("cache")) {
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dir.create("cache")
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}
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cache_file <- paste("cache/", id, ".rds", sep = "")
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if (file.exists(cache_file)) {
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# If the cache file exists, we restore the data from it.
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readRDS(cache_file)
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} else {
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# If the cache file doesn't exist, we have to do the computation.
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data <- func(...)
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# The results are cached for the next run.
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saveRDS(data, cache_file)
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data
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}
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}
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# This is needed to make data.table's and shiny's symbols available within the
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# package.
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#' @import data.table
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#' @import shiny
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NULL
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