Re: :session question

["Andreas Röhler" <andreas.roehler@easy-emacs.de>]

Am 27.03.2013 12:48, schrieb Nick Dokos:
> Andreas Röhler <andreas.roehler@easy-emacs.de> wrote:
>
>> Am 27.03.2013 10:27, schrieb Andreas Leha:
>>> Andreas Röhler <andreas.roehler@easy-emacs.de> writes:
>>>
>>>> Am 26.03.2013 16:31, schrieb Eric Schulte:
>>>>> Achim Gratz <Stromeko@Nexgo.DE> writes:
>>>>>
>>>>>> Am 26.03.2013 13:37, schrieb Eric Schulte:
>>>>>>> This can be done system wide by setting the language-specific header
>>>>>>> arguments.
>>>>>>
>>>>>> I've yet to see an example on how to do this.
>>>>>>
>>>>>
>>>>>        #+begin_src emacs-lisp
>>>>>          (setq org-babel-default-header-args:R
>>>>>                '((:session . "org-R")))
>>>>>        #+end_src
>>>>>
>>>>>        #+RESULTS:
>>>>>        | (:session . org-R) |
>>>>>
>>>>>        #+begin_src R
>>>>>        x <- 1
>>>>>        x
>>>>>        #+end_src
>>>>>
>>>>>        #+RESULTS:
>>>>>        : 1
>>>>>
>>>>>        #+begin_src R
>>>>>        x
>>>>>        #+end_src
>>>>>
>>>>>        #+RESULTS:
>>>>>        : 1
>>>>>
>>>>>>
>>>>
>>>> Hi,
>>>>
>>>> this looks very confusing for me.
>>>>
>>>> So, what is the purpose of a named session?
>>>> Understood it being a name-space, whose values don't affect the other ones.
>>>> What's in python-mode a dedicated shell.
>>>
>>> I can't speak for python, but in R, every differently named session will
>>> run within its own R process.
>>>
>>> The cool thing is, that I can work on file_foo.org and file_bar.org
>>> simultaneously, when file_foo.org uses R-session *foo* and file_bar.org
>>> uses R-session *bar*.
>>>
>>> [...]
>>>
>>> Regards,
>>> Andreas
>>>
>>>
>>>
>>>
>>
>>
>> Okay, that's the expected usage.
>> How do you read the example displayed?
>>
>> Looks like a named (:session . "org-R") affects global R namespace.
>>
>> What did "org-R" say here, what might be the purpose?
>>
>> Assume it should switch it on. Then "org-R" represents a boolean here?
>>
>
> "org-R" is the name of the session. The code blocks illustrate that the
> value of x (set in the first code block) is preserved and can be used
> in the second (and subsequent) code blocks.
>
> Nick
>
>

Okay, so the :session argument must not be repeated?

i.e. doesn't look like a session, resp. not a named session

 >>>>> #+begin_src R
 >>>>>        x <- 1
 >>>>>        x
 >>>>> #+end_src


Once a named session "org-R" is started all non-sessioned source goes there?
Looks like a broken namespace.