Right. My opinion is that grade with an array of lists should do lexical ordering. Given the fact that grade on depth-2 arrays are not specified by the standard anyway, it should be safe.
Regards, Elias On 8 July 2014 12:51, David B. Lamkins <dlamk...@gmail.com> wrote: > I think it'd be really handy if that expression did what we'd like it to > do. I guess it'd fall under the category of "conforming extension". > > Neither IBM nor ISO APL define a behavior for dyadic grade with other > than a character matrix as the right argument. > > On Tue, 2014-07-08 at 12:40 +0800, Elias Mårtenson wrote: > > To clarify, I tried the following: > > > > > > (⎕UCS¨⍳1114111) ⍋ 'foo' 'bar' 'test' > > DOMAIN ERROR > > (⎕UCS¨⍳1114111)⍋'foo' 'bar' 'test' > > ^ ^ > > > > > > Note of course that this is pretty insane, and there should be an > > easier way to do this. > > > > > > Regards, > > Elias > > > > > > On 8 July 2014 12:38, Elias Mårtenson <loke...@gmail.com> wrote: > > Right, but just having a "plain" collating order for Unicode > > would require me to pass a million-element array > > (⎕UCS¨⍳1114111) as left argument to grade. > > > > > > That said, I can't even get dyadic grade to work at all, but > > that's a separate issue. > > > > > > Regards, > > Elias > > > > > > On 8 July 2014 12:27, David B. Lamkins <dlamk...@gmail.com> > > wrote: > > The problem with generating a permutation vector for > > an "arbitrary" > > Unicode string is still a problems of collating order. > > There is no > > inherent order in Unicode; someone has to decide on > > what makes sense as > > a collating order for the subset of code points used > > by the application. > > > > You should use ⎕ucs with a vector of code points to > > define your own > > collating order for Unicode; any code points not > > explicitly specified in > > the collating order will sort to the end. > > > > For example (and this is an easy case) you can use > > this to specify a > > default collating order (based upon ordinal value of > > the code points > > themselves) for the 8-bit ASCII subset: > > > > ⎕ucs ⎕io-⍨⍳256 > > > > > > > > On Tue, 2014-07-08 at 12:09 +0800, Elias Mårtenson > > wrote: > > > Dyadic grade doesn't make much sense in the context > > of Unicode though. > > > How do you grade an arbitrary Unicode string? > > > > > > > > > That issue is there even if we completely disregard > > all the > > > other Unicode-related collating issues. > > > > > > > > > Regards, > > > Elias > > > > > > > > > On 8 July 2014 12:00, David B. Lamkins > > <dlamk...@gmail.com> wrote: > > > Check my follow-up post. > > > > > > I'm fairly certain that the issue is whether > > monadic grade > > > applied to a > > > list of strings should do anything but > > signal a domain error. > > > The ISO > > > spec says that monadic grade is defined only > > on numeric > > > arguments. > > > > > > My test case appears to have monadic grade > > treating strings as > > > if they > > > encode numbers in a sufficiently large base. > > > > > > If you want to sort strings, use dyadic > > grade. The left > > > argument > > > specifies a collating sequence. > > > > > > On Tue, 2014-07-08 at 11:43 +0800, Elias > > Mårtenson wrote: > > > > Ordering by size first makes very little > > sense to me. It > > > makes it very > > > > hard to sort any list of strings. > > > > > > > > > > > > I was hoping that the following would have > > done so, but it > > > also > > > > suffers from the "length first" issue: > > > > > > > > > > > > z[⍋ ⎕UCS¨ z←'aa' 'xx' 'aaa' 'xxx'] > > > > aa xx aaa xxx > > > > > > > > > > > > What is the proper way to sort strings > > given the existing > > > semantics of > > > > grade? > > > > > > > > > > > > Regards, > > > > Elias > > > > > > > > > > > > On 8 July 2014 02:34, David Lamkins > > <da...@lamkins.net> > > > wrote: > > > > Looking at the spec, it seems that > > monadic grade is > > > defined > > > > only for numeric data. > > > > > > > > > > > > That leaves open the question of > > whether my example > > > should > > > > have signaled a domain error. > > > > > > > > > > > > > > > > On Mon, Jul 7, 2014 at 11:25 AM, > > David Lamkins > > > > <da...@lamkins.net> wrote: > > > > Given a list of character > > vectors (and > > > scalars), grade > > > > appears to generate the > > permutation vector > > > first by > > > > length then by content. > > > > > > > > ⍋'aaa' 'xx' 'y' > > 'bbb' 'cc' > > > > 3 5 2 1 4 > > > > > > > > > > > > This seems > > counterintuitive. It seems as if > > > ⍋ treats > > > > character strings like > > numbers. Is this a > > > bug? > > > > > > > > -- > > > > "The secret to creativity > > is knowing how to > > > hide your > > > > sources." > > > > Albert Einstein > > > > > > > > > > > > > > http://soundcloud.com/davidlamkins > > > > > > http://reverbnation.com/lamkins > > > > > > http://reverbnation.com/lcw > > > > http://lamkins-guitar.com/ > > > > http://lamkins.net/ > > > > > > http://successful-lisp.com/ > > > > > > > > > > > > > > > > -- > > > > "The secret to creativity is > > knowing how to hide > > > your > > > > sources." > > > > Albert Einstein > > > > > > > > > > > > http://soundcloud.com/davidlamkins > > > > http://reverbnation.com/lamkins > > > > http://reverbnation.com/lcw > > > > http://lamkins-guitar.com/ > > > > http://lamkins.net/ > > > > http://successful-lisp.com/ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >
