What is the most elegant way to apply an array of functions to an array of non-functions?
On Sun, 17 Jan 2021 at 18:27, Henry Rich <[email protected]> wrote: > > It gives them a wrong mental model of rank, which they must unlearn > later. This can have serious consequences, particularly if they get > the idea that u"n is 'like u with the rank set to n' (if that were true, > u"1"_1 would be the same as u"_ 1, which it isn't). > > Ken thought you should learn J like you learn a natural language, by > seeing and saying, and creating your own rules internally. I think he > was wrong when it comes to verb rank. The idea is so new, and so > subtle, that users left to themselves get it wrong. I had one very > bright student who, discovering that (,1) + 1 2 3 gave an error, found > that +/ would not give an error, and ever after applied / to every > verb. He created his own rule, you see. > > Henry Rich > > On 1/17/2021 12:24 AM, Raul Miller wrote: > > Does it really cost them that much? > > > > Given that beginner problems generally do not involve multi-megabytes > > of data, I mean... > > > > Thanks, > > > > > -- > This email has been checked for viruses by AVG. > https://www.avg.com > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
