Re: [Caml-list] Clarification of original post [still having problems]

[Karl Zilles <zilles@1969.ws>]

Ryan Bastic wrote:
> The specific problems that confuse me is that 
> 
> let rec group' ... in Array.of_list is all part of the same expression,
> so how does Ocaml
> let front :: group' n rest work??

It is a recursive funtion call.  Is this clear?

> firstN n input returns two arrays, and  as far as my
> understanding goes, :: is a list concatenation operator. How then, does
> this work?

:: is a list building primitive.  If you have a list of integers (ilist) 
and you want to add an integer (newi) to the front, you would use:

newi :: ilist

So in general you add a foo to a foolist with (foo::foolist).

In your case, we are adding an array to a list of arrays.
front is the first array returned by the earlier call to firstN.
group' returns a list of arrays.


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