Re: Sequential evaluation of lists
- To: mathgroup at smc.vnet.net
- Subject: [mg53187] Re: Sequential evaluation of lists
- From: "Ray Koopman" <koopman at sfu.ca>
- Date: Tue, 28 Dec 2004 06:30:38 -0500 (EST)
- References: <email@example.com>
- Sender: owner-wri-mathgroup at wolfram.com
Ray Koopman wrote: > When I first started using Mathematica (v2), one of the features > that I found rather surprising is its sequential evaluation of lists > [...] so far I have found no exception to sequential evaluation > and no mention of it in any documentation. Have I missed something? Yes. In an offline message, DrBob wrote: > In the Book, section 2.6.4, it's explained that Mathematica has a > standard evaluation procedure: > > Evaluate the head of the expression. > Evaluate each element in turn. > .... other rules > > So yes, it appears that sequential evaluation is the basic rule -- > with exceptions when the Head has attributes HoldFirst or Orderless, > etc. The standard evaluation procedure is the same now as it was in v2 -- only the section number has changed.