[erlang-questions] lists:takewhile and lists:splitwith

[Richard O'Keefe]

On 3/02/2011, at 11:06 PM, Joseph Wayne Norton wrote:

> 
> Try the following ...
> 
> 5> lists:partition(fun(A)-> A<3 end,[1,2,3,4,5]).
> {[1,2],[3,4,5]}


For this example, all of

   lists:partition(fun (A) -> A < 3 end, [1,2,3,4,5])

   lists:splitwith(fun (A) -> A < 3 end, [1,2,3,4,5])

   lists:splitwith(fun (A) -> A/= 3 end, [1,2,3,4,5])

give the same answer.  It is only when the list is sorted
that this is so.  None of them uses the fun that the
OP wished to use.