What I don’t quite understand was the expansion of -.&;:&’-‘ y to y (-.&;:) ‘-‘ and then (;: y) -. (;: ‘-‘)
So I was thinking the -.&;: is a hook. Complete newbie, so apologies. > On Jan 16, 2022, at 8:46 PM, Hauke Rehr <[email protected]> wrote: > > I don’t quite understand. > LHS is just the result of applying ;: to the value 'start-A'. > > Am 17.01.22 um 05:45 schrieb P Padilcdx: >> 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 >>>>> >>> >>> -- >>> ---------------------- >>> mail written using NEO >>> neo-layout.org >>> >>> ---------------------------------------------------------------------- >>> For information about J forums see http://www.jsoftware.com/forums.htm >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > > -- > ---------------------- > mail written using NEO > neo-layout.org > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
