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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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 <[email protected]>
>> > 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
>> > > <[email protected]> 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/
>> > >
>> > >
>> >
>> >
>> >
>> >
>> >
>>
>>
>>
>
