Message-ID: <CADwNEa6JzhKN2maS-mUd+OiJkijuz_ZpHEWwm3o7VWEBf3wjvw@mail.gmail.com>
Date: 2015-05-30T14:35:50Z
From: Munawar Cheema
Subject: puzzling behaviour of identical function
I am puzzled by the following seemingly contradictory calls to the function
identical. Below is a minimal example, that reproduces them:
> sessionInfo()
R version 3.2.0 (2015-04-16)
Platform: x86_64-apple-darwin13.4.0 (64-bit)
Running under: OS X 10.9.5 (Mavericks)
locale:
[1] C
attached base packages:
[1] stats graphics grDevices utils datasets grid methods
[8] base
loaded via a namespace (and not attached):
[1] compiler_3.2.0 tools_3.2.0 memoise_0.2.1 digest_0.6.8
> readLines("tmp.R")
[1] "if (identical(function(x)1,function(x)1)) cat(\"Identical!\\n\")
else cat(\"Not Identical!\\n\")"
> sys.source("tmp.R", envir=new.env(parent=baseenv()))
Identical!
> if (identical(function(x)1,function(x)1)) cat("Identical!\n") else cat("Not Identical!\n")
Not Identical!
Can anyone explain why I get a false value from the command line but true if I
use sys.source?
--
Kind Regards
Munawar Cheema