[erlang-questions] concentate solution well ??

[Bob Ippolito]

The goal is to solve the problem as stated such that it would work for
*any* example, not just that one. It's very easy to come up with an example
that does not work with your implementation.

Perhaps you should read the source for the lists module, and take the time
to try and understand it.
https://github.com/erlang/otp/blob/maint/lib/stdlib/src/lists.erl

On Sun, Feb 1, 2015 at 2:14 AM, Roelof Wobben <r.wobben@REDACTED> wrote:

> Hello,
>
> I have this exercise of the Erlang programming book.
>
> Write a function that, given a list of lists, will concatenate them.
> Example:
> concatenate([[1,2,3], [], [4, five]]) ⇒ [1,2,3,4,five].
> Hint: you will have to use a helpfunction and concatenate the lists in
> several steps.
>
> But I do not need to use a helper function because it can be solved like
> this :
>
> concatenate( [List1 , List2 , List3] ) ->
>     List1 ++ List2 ++ List3.
>
> Or is this not the solution that is meant on this exercise ?
> Do I need to solve it by using pattern matching ?
>
> Roelof
>
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