[erlang-questions] Irregular list

[Zvi]

technicaly [a|b] is not a proper list, it's what called in LISP a "cons-cell"
(a . b) in proper list cdr (i.e. tail) field of last element must be nil (or
[] ) in Erlang.


Ladvánszky Károly-2 wrote:
> 
> Just getting acquainted with this wonderful system, I’ve 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 it like an “open list” found in some programming languages?
> 
>  
> 
>  
> 
>  
> 
> Any help would be appreciated,
> 
>  
> 
> LKaroly
> 
>  
> 
> 
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