implicit return? [🇷 for BE/BA]

posted by Helmut Homepage – Vienna, Austria, 2019-04-29 01:38 (1767 d 22:54 ago) – Posting: # 20259
Views: 6,285

Hi ElMaestro,

❝ My functions almost always look like this:

❝ Foo=function(bar)

❝ {

❝   ##blah blah, conditions and functionality and loops and loads of curly braces here.
❝   ##whatever happens in loops and conditions it sets a variable called e.g. rslt


❝   return(rslt) ##I always have a line at the end that looks like this!

❝ }


Good practice. I use it in longer functions as well and in ones which become part of a package, always. Only very, very slightly slower:
library(microbenchmark)
impl <- function(x) {
  if (x == 0) {
    "foo"
  } else {
    "bar"
  }
}
expl <- function(x) {
  if (x == 0) {
    return("foo")
  } else {
    return("bar")
  }
}
braces.with.suspenders <- function(x) {
  if (x == 0) {
    res <- "foo"
  } else {
    res <- "bar"
  }
  return(res)
}
res <- microbenchmark(impl(round(runif(1), 0)),
                      expl(round(runif(1), 0)),
                      braces.with.suspenders(round(runif(1), 0)),
                      times=3000L)
print(res)

Unit: microseconds
                                      expr   min    lq     mean median    uq    max neval cld
                  impl(round(runif(1), 0)) 1.811 1.812 1.976830  1.813 2.114  5.434  3000  a
                  expl(round(runif(1), 0)) 1.811 1.812 1.976926  1.813 2.114  6.340  3000  a
braces.with.suspenders(round(runif(1), 0)) 1.811 1.812 2.027029  2.114 2.114 16.905  3000   b

Dif-tor heh smusma 🖖🏼 Довге життя Україна! [image]
Helmut Schütz
[image]

The quality of responses received is directly proportional to the quality of the question asked. 🚮
Science Quotes

Complete thread:

UA Flag
Activity
 Admin contact
22,916 posts in 4,807 threads, 1,646 registered users;
39 visitors (0 registered, 39 guests [including 14 identified bots]).
Forum time: 23:33 CET (Europe/Vienna)

Nothing shocks me. I’m a scientist.    Harrison Ford (as Indiana Jones)

The Bioequivalence and Bioavailability Forum is hosted by
BEBAC Ing. Helmut Schütz
HTML5