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summary: Specifically, how does one do stack/FIFO operations in R? Generally, how does one code functions with side effects in R? details: I have been a coder for years, mostly using C-like semantics (e.g., Java). I am now trying to become a scientist, and to use R, but I don't yet have the sense of "good R" and R idiom (i.e., expressions that are to R what (e.g.) the Schwartzian

It would be nie to have some basic stack operations for simple vectors and lists. ie: > a <- c(1,2,3,4,5) > b <- pop(a) > a [1] 1 2 3 4 >b [1] 5 > push(b, 6) > b [1] 5 6 notice how pop and push modify the original vector and not local copy inside the functions environment. Is there any way to do this? I tried this: push <- function(vec,val) { vec <<-