Bioequivalence and Bioavailability Forum • implicit return?

implicit return? [🇷 for BE/BA]

posted by Helmut – Vienna, Austria, 2019-04-29 01:38 (1817 d 19:59 ago) – Posting: # 20259
Views: 6,579

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!
Helmut Schütz

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Complete thread:

R Inferno Helmut 2019-04-26 16:03
- full conditions! mittyri 2019-04-26 16:20
  - full conditions! Helmut 2019-04-26 16:41
  - full conditions! d_labes 2019-04-27 14:29
    - magik of R implicit return mittyri 2019-04-27 22:23
      - magik of R implicit return ElMaestro 2019-04-27 22:34
        
        implicit return? d_labes 2019-04-28 19:36
        
        implicit return? ElMaestro 2019-04-28 20:36
        implicit return? Helmut 2019-04-28 20:50
        
        implicit return? ElMaestro 2019-04-28 21:16
        
        implicit return?Helmut 2019-04-28 23:38
        
        implicit return? ElMaestro 2019-04-29 09:40
        
        implicit return? Helmut 2019-04-29 10:41
        
        implicit return? ElMaestro 2019-04-29 12:55
        
        built-in ifelse mittyri 2019-04-30 13:05