MathGroup Archive 2004

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Sequential evaluation of lists

  • To: mathgroup at
  • Subject: [mg53071] Sequential evaluation of lists
  • From: "Ray Koopman" <koopman at>
  • Date: Wed, 22 Dec 2004 04:53:13 -0500 (EST)
  • Sender: owner-wri-mathgroup at

When I first started using Mathematica (v2), one of the features that
I found rather surprising is its sequential evaluation of lists, as in

In[1]:= x = 0; {x++,x++,x++}
Out[1]= {0,1,2}

I had expected a warning that such code should be avoided because
it presumed sequential evaluation, which could not be guaranteed,
and a recommendation to treat list elements as being evaluated in
parallel -- if not simultaneously then in no particular order.
However, so far I have found no exception to sequential evaluation
and no mention of it in any documentation. Have I missed something?

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