Stop lapply from printing to console

Question

When I use lapply and print to the console it prints unwanted [[i]]NULL though I want the intended message to print to the console. I\'ve tried

Answer 1

Use invisible, eg:

invisible(FUN("hello"))
hello 1
hello 2
hello 3

You can wrap it around the lapply call in the function too to make it tidier.

Answer 2

Use l_ply from plyr:

library(plyr)
FUN <- function(x) {
    FUN2 <- function(z) message(z)
    l_ply(1:3, function(i) FUN2(paste(x, i)))
}
FUN("hello")

Answer 3

You could use a plain ol' for loop instead of lapply():

FUN <- function(x) {
  for (i in 1:3) {
    message(paste0(x, i))
  }
}
FUN("hello")