[erlang-questions] Irregular list
Thu Feb 12 16:38:03 CET 2009
Ladvánszky Károly writes:
> Just getting acquainted with this wonderful system, Ive run into the
> following issue:
> The shell seems to accept a structure like this: [a | b].
> is_list([a | b]) returns true but length([a | b]) raises an exception.
is_list/1 only inspects the top-most node of the structure and tests
if it's a "list cell" or not. It's poorly named and corresponds to
testing for a "cons" in Lisp dialects.
> Is it like an open list found in some programming languages?
Wouldn't know. Never heard of that one.
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