On 8/18/10 2:23 PM, Standish P wrote:
On Aug 17, 6:38 pm, John Passaniti<john.passan...@gmail.com> wrote:
You asked if Forth "borrowed" lists from Lisp. It did not. In Lisp,
lists are constructed with pair of pointers called a "cons cell".
That is the most primitive component that makes up a list. Forth has
no such thing; in Forth, the dictionary (which is traditionally, but
not necessarily a list) is a data structure that links to the previous
word with a pointer.
Would you show me a picture, ascii art or whatever for Forth ? I know
what lisp lists look like so I dont need that for comparison. Forth
must have a convention and a standard or preferred practice for its
dicts. However, let me tell you that in postscript the dictionaries
can be nested inside other dictionaries and any such hiearchical
structure is a nested associative list, which is what linked list,
nested dictionaries, nested tables are.
You indicated that you have a copy of Forth Application Techniques.
Sections 8.1 and 8.2 cover this topic, with some drawings.
Cheers,
Elizabeth
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