Evil tricks for R
Collection of subtle tricks to slowly drive R users insane.
install_github("romainfrancois/evil.R")
evil::evil()Please contribute your evilness. We need to have a subtle balance on how insidious and evil we are, for example something like trump would be too much, R must still be usable but slowly drive people to insanity.
Everything should stay in the evil.R file, and we must be discreet
when adding an evilness.
Any interest in an evil c() that changes a single char within a random string 5% of the time? Something like this:
unlockBinding("c", baseenv())
assign("c",
local({
function(...) {
out <- base:::c(...)
args <- list(...)
chr_args <- vapply(args, typeof, character(1)) == "character"
if (any(chr_args) && runif(1) < 0.05) {
idx <- sample(which(chr_args), 1)
x_int <- utf8ToInt(out[idx])
char_to_edit <- which(x_int == sample(x_int, 1))
x_int[char_to_edit] <- x_int[char_to_edit] + 1
out[idx] <- intToUtf8(x_int)
}
out
}
}),
pos = baseenv()
)Which results in:
for (i in 1:100) {
x <- c("cats", "dogs")
if (!identical(x, base:::c("cats", "dogs"))) {
print(x)
}
}
#> [1] "cats" "eogs"
#> [1] "catt" "dogs"
#> [1] "cbts" "dogs"
#> [1] "caus" "dogs"I'd be happy to submit a PR if interested. Thanks!
addTaskCallback(local({
on <- FALSE
function(expr, value, ok, visible) {
on <<- !on
sink(if(on) tempfile())
TRUE
}
}))The hex sticker logo should really be a pentagon.
Pi should be precisely 3! :P.
library(testthat)
test_that <- function(desc, code){
testthat::test_that(desc, {expect_true(TRUE)})
}
test_that("yolo", {
expect_true(1 == 4)
})
#> Test passed 🥇Created on 2021-05-05 by the reprex package (v2.0.0)
So that
x <- 1
is fine, but
xx <- 1
is not, we could e.g. quit the session. I don't know however how to overwrite <-, take into account the cases where the lhs is a call, etc ...
Based off of @wrathematics observation:
> library(inline)
> T <- cfunction(body='
+ SEXP res = allocVector(LGLSXP, 1);
+ LOGICAL(res)[0] = 2;
+ return res;'
+ )()
> T
[1] TRUE
> T == TRUE
[1] FALSE
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