[Rd] Inconsistency in creating/opening/closing/destroying connections
Jens Oehlschlägel
joehl@web.de
Wed, 20 Dec 2000 13:56:49 +0100
I expected close() to be the opposite of open(), but
> # create a connection
> con <- file("ex.data")
> # open it
> open(con, "w")
> # close it
> close(con)
> # re-open it
> open(con, "w")
Error in open.connection(con, "w") : invalid connection
>
> con
Error in summary.connection(x) : invalid connection
> # is obviously pointing to a non-existing connection
help to showConnections obviously also was assuming that there may EXIST something like a CLOSED connection, as it says
all logical: if true all connections, including CLOSED ONES and the standard ones are displayed. If false only open user-created connections are included.
So this is at least a documentation bug, but what about having something like
CreateConnection
OpenConnection
CloseConnection
DestroyConnection
Is there any reason to have (as currently) OpenConnection seperated from CreateConnection but CloseConnection and DestroyConnection combined?
Regards
Jens Oehlschlägel
--please do not edit the information below--
Version:
platform = i386-pc-mingw32
arch = x86
os = Win32
system = x86, Win32
status =
major = 1
minor = 2.0
year = 2000
month = 12
day = 15
language = R
Windows NT 4.0 (build 1381) Service Pack 6
Search Path:
.GlobalEnv, package:ctest, Autoloads, package:base
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