Counter with file storage

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examples/files/counter.R

filename = "count.txt"
count <- 0

if (file.exists(filename)) {
    count <- as.numeric(readLines(filename))
}

count <- count + 1

cat(count, end="\n")

fh <- file(filename, "w")
cat(count, end="\n", file = fh)
close(fh)