On 2008.04.08, Bahr, Michael <mbahr@[...].gov>  wrote:
>   
>  > What's the difference between these two arrays:
>  > 
>  >     ("a", "b", "c", "")  and  ("a", "b", "c")
>  > 
>  > Not being able to tell the difference programatically is a 
>  > bug in the programming language, not a feature.
>  
>  Ah but this ("a", "b", "c",) is not the same as ("a", "b", "c", "")

Are you suggesting the first is ("a", "b", "c", undef)?  Yes, indeed,
that _is_ different than ("a", "b", "c", "").  However, the original
data was:

    "a,b,c,"
    
How do you express "undef" in a stringified representation of data?
Hint: only if you pre-define a means to do so, defining a semantic rule
to the data _after_ it's been parsed.  Otherwise, it _is_ an element
that is just an empty string at the end.  Which is, exactly what Tcl
gives you.


-- 
Dossy Shiobara              | dossy@[...].com | http://dossy.org/
Panoptic Computer Network   | http://panoptic.com/
  "He realized the fastest way to change is to laugh at your own
    folly -- then you can let go and quickly move on." (p. 70)
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