[R] Is this a bug?

[Luca Braglia]

I have found a strange "ifelse" behaviour (I think)

This works:

> ifelse(T,1+1,1+2)
[1] 2
> ifelse(F,1+1,1+2)
[1] 3

Maybe I missed something about R internals, but why

> ifelse(T,print("hello"),print("goodbye"))
[1] "hello"
[1] "hello"
> ifelse(F,print("hello"),print("goodbye"))
[1] "goodbye"
[1] "goodbye"

values are returned two times? I'm not sure: if it's a bug I'll post it
immediately 

Thank You

	Luca


Version:
 platform = i486-pc-linux-gnu
 arch = i486
 os = linux-gnu
 system = i486, linux-gnu
 status = 
 major = 2
 minor = 4.1
 year = 2006
 month = 12
 day = 18
 svn rev = 40228
 language = R
 version.string = R version 2.4.1 (2006-12-18)

Locale:
LC_CTYPE=it_IT.UTF-8;LC_NUMERIC=C;LC_TIME=it_IT.UTF-8;LC_COLLATE=it_IT.UTF-8;LC_MONETARY=it_IT.UTF-8;LC_MESSAGES=it_IT.UTF-8;LC_PAPER=it_IT.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=it_IT.UTF-8;LC_IDENTIFICATION=C

Search Path:
 .GlobalEnv, package:MASS, package:utils, package:stats, package:graphics, package:grDevices, package:methods, Autoloads, package:base