shiny
htmltools
req()
seq()
on.exit()
observe()
isolate
observeEvent
eventReactive
reactiveTimer()
invalidateLater(ms)
git
If we create a list.
x <- list(a = 1, b = 1)
And a function to modify the element “a” of the list.
f <- function(x) { x$a = 2 invisible(x) }