[erlang-questions] What does it mean when an evaluated expression is a list that contains the pipe character?

[Cole Fichter]

Ah, ok!  That SO post is amazing. Thanks for the quick reply.

On 24 February 2015 at 08:53, Gordon Guthrie <gguthrie@REDACTED> wrote:

> C
>
> In case you are uncertain as to what that means - here is a wee primer:
>
>
> http://stackoverflow.com/questions/1919097/functional-programming-what-is-an-improper-list
>
> G
>
> Le 24 févr. 2015 à 15:37, Cole Fichter <cole.fichter@REDACTED> a écrit :
>
> I came across the example:
>
> > [1,2|3].
> [1,2|3]
>
> I understand that the pipe character, |, can be used to append an item to
> the head of the list or to pop an item off the list in a pattern match.
>
> But what exactly is happening in the example above? Why does the evaluated
> expression still contain the pipe?
>
> My best guess is that the final expression results in a match
> specification that could be used in a pattern match. However, that seems
> strange too because if so, we'd be popping two items off the list, which
> should be illegal.
>
> Can someone shed some light?
>
> Thanks!
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