Can a code block be evaluated in multiple sessions

Can a code block be evaluated in multiple sessions

[Jack Li]

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Hi,

Can anyone tell me if a code block can be evaluated in multiple sessions?
In this toy example I provide, function "f1" is defined in the first block,
 and I want to use "f1" in both the second block (session a)  and the third
block (session b).

#+BEGIN_SRC R
  f1 <- function(x,y,z) x+y+z
#+END_SRC

#+BEGIN_SRC R :session a
f1(1,2,3)
#+END_SRC

#+BEGIN_SRC R  :session b
f1(2,4,6)
#+END_SRC

PS: the three blocks should be in one .org file, and, when exporting,
"session a" and "session b" will be run simultaneously and independently.

Thanks,
Jack

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