thank you Raul, a bit cleaner/what I was looking for
>@,@:(<@;"1) ({.,"0 1 $:^:(1<L.)@}.)@> (] <@; $:^:(1 < #)@-.)"1 0~ 0 1 2 3
it mirrors (,"0 1) the direct construction method as well.
----- Original Message -----
From: Raul Miller <[email protected]>
To: Programming forum <[email protected]>
Sent: Monday, May 2, 2016 2:47 PM
Subject: Re: [Jprogramming] permutations the slow way
This, perhaps:
;"1 ({.,"0 1 $:^:(1<L.)@}.)@> (] <@; $:^:(1 < #)@-.)"1 0~ 0 1 2 3
Sorry about the goof, earlier.
Thanks,
--
Raul
On Mon, May 2, 2016 at 2:40 PM, Raul Miller <[email protected]> wrote:
> This, then, perhaps?
>
> ([: ; <S:0)"1 ({.,.$:^:(2>L.)@}.)S:_1 (] <@; $:^:(1 < #)@-.)"1 0~ 0 1 2 3
>
> Thanks,
>
> --
> Raul
>
>
> On Mon, May 2, 2016 at 1:59 PM, 'Pascal Jasmin' via Programming
> <[email protected]> wrote:
>> It should also work with deeper trees.
>>
>> One way that avoids the tree building step is
>>
>> ,&.:(<"1)@:((] ,"0 1 $:^:(1 < #)@-.)"1 0~) 0 1 2 3
>>
>> but I also struggle with the tree walking approach that is say generated with
>>
>> (] <@; $:^:(1 < #)@-.)"1 0~ 0 1 2 3
>>
>>
>>
>> ----- Original Message -----
>> From: Raul Miller <[email protected]>
>> To: Programming forum <[email protected]>
>> Sent: Monday, May 2, 2016 1:06 PM
>> Subject: Re: [Jprogramming] permutations the slow way
>>
>> This good enough?
>>
>> ;"1 ({.,.>@}.)S:2 (] <@; $:^:(1 < #)@-.)"1 0~ 0 1 2
>>
>> Or did you have additional constraints?
>>
>> Thanks,
>>
>> --
>> Raul
>>
>>
>> On Mon, May 2, 2016 at 11:21 AM, 'Pascal Jasmin' via Programming
>> <[email protected]> wrote:
>>> how might you derive the unboxed permutation list from this tree?
>>>
>>> (] <@; $:^:(1 < #)@-.)"1 0~ 0 1 2
>>> +---------------+---------------+---------------+
>>> |+-+-----+-----+|+-+-----+-----+|+-+-----+-----+|
>>> ||0|+-+-+|+-+-+|||1|+-+-+|+-+-+|||2|+-+-+|+-+-+||
>>> || ||1|2|||2|1|||| ||0|2|||2|0|||| ||0|1|||1|0|||
>>> || |+-+-+|+-+-+||| |+-+-+|+-+-+||| |+-+-+|+-+-+||
>>> |+-+-----+-----+|+-+-----+-----+|+-+-----+-----+|
>>> +---------------+---------------+---------------+
>>> ----------------------------------------------------------------------
>>> For information about J forums see http://www.jsoftware.com/forums.htm
>>
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