That helps.  What rule applies for making the LHS? Is it a hook?
Thank You!!

> On Jan 16, 2022, at 8:09 PM, Hauke Rehr <[email protected]> wrote:
> 
> Maybe I should elaborate on this a bit more:
> 
> ] LHS =: ;: 'start-A'
> ┌─────┬─┬─┐
> │start│-│A│
> └─────┴─┴─┘
>   ] RHS =: ;: '-'
> ┌─┐
> │-│
> └─┘
>   LHS -. RHS
> ┌─────┬─┐
> │start│A│
> └─────┴─┘
>   (;: 'start-A') -. (;: '-')
> ┌─────┬─┐
> │start│A│
> └─────┴─┘
> 
> Or was the missing link for you somewhere else?
> 
> Am 17.01.22 um 04:56 schrieb Hauke Rehr:
>> First, you apply ;._2
>> Then it’s just a row-wise -.&;:
>> eg
>>    'start-A' (-.&;:) '-'
>> ┌─────┬─┐
>> │start│A│
>> └─────┴─┘
>> Am 17.01.22 um 04:01 schrieb P Padilcdx:
>>> Slowly following the discussion. I confess I’m stuck at how the composition 
>>> of -.&;:&’-‘ work in the unpack verb.  Try to read the description of & in 
>>> NuVoc and LJ, but i confess to still be clueless as to how J parses it. I 
>>> experimented a bit but still perplexed.  Can someone point me in the right 
>>> direction?  Much appreciated.
>>> 
>>> 
>>> Thanks
>>> Pete
>>> 
>>>> On Jan 2, 2022, at 11:52 AM, Raul Miller <[email protected]> wrote:
>>>> 
>>>> unpack=:-.&;:&'-';._2
>>> 
>>> ----------------------------------------------------------------------
>>> For information about J forums see http://www.jsoftware.com/forums.htm
>>> 
> 
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