So I have a BysteString vector A, containing a bunch of byte strings of 
varying lengths of the form:

"1,2,\n"
"\n"
"5,2,4\n"

etc. 

What I have set up is to do 

[vec(readdlm(IOBuffer(line), ',', Float64)) for line in A]

However because as you see above the second line is empty except for the 
newline escape character, it throws an error.  What I would like it to do 
instead is simply return an empty array Float64[] for that line.  That 
seems like what it *should* do, and I'm not sure why it doesn't.  Is there 
any way I can make it behave like I want it to?

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