On Thu, 15 Dec 2005, Luke Palmer wrote:
On 12/15/05, Darren Duncan [EMAIL PROTECTED] wrote:
I propose, perhaps redundantly, that Perl 6 include a complete set of
native
Okay, I'm with you here. Just please stop saying native and core.
Everyone.
Here, here.
I would like to hear from Ovid
Rob Kinyon [EMAIL PROTECTED] writes:
On 12/16/05, Ovid [EMAIL PROTECTED] wrote:
Minor nit: we're discussing to the relational algebra and not the
relational Calculus (unless the topic changed and I wasn't paying
attention. I wouldn't be surprised :)
Algebra, in general, is a specific form
--- Rob Kinyon [EMAIL PROTECTED] wrote:
As for the syntactic sugar, I'm not quite sure what should be
done here. And, with macros, it's not clear that there needs
to be an authoritative answer. Personally, I'd simply overload
+ for union, - for difference, * for cross-product, / for
divide,
On 12/16/05, Ovid [EMAIL PROTECTED] wrote:
--- Rob Kinyon [EMAIL PROTECTED] wrote:
As for the syntactic sugar, I'm not quite sure what should be
done here. And, with macros, it's not clear that there needs
to be an authoritative answer. Personally, I'd simply overload
+ for union, - for
I agree with just about everything you wrote. I only have two minor
quibbles and they may merely be restatements of what you meant.
--- Rob Kinyon [EMAIL PROTECTED] wrote:
Overriding the operators in a generic way so that you have
to have an exact type match before you compare values also,
On 12/16/05, Ovid [EMAIL PROTECTED] wrote:
Minor nit: we're discussing to the relational algebra and not the
relational Calculus (unless the topic changed and I wasn't paying
attention. I wouldn't be surprised :)
Algebra, in general, is a specific form of calculus. So, we're
speaking of the
At 2:54 AM + 12/15/05, Luke Palmer wrote:
On 12/15/05, Darren Duncan [EMAIL PROTECTED] wrote:
I propose, perhaps redundantly, that Perl 6 include a complete set of
native
Okay, I'm with you here. Just please stop saying native and core.
Everyone.
Yes, of course. What I meant was
As an addendum to what I said before ...
The general kind of thing I am proposing for Perl 6 to have is a
declarative syntax for more kinds of tasks, where you can simply
specify *what* you want to happen, and you don't have to tell Perl
how to perform that task.
An example of declaratives
On Dec 15, 2005, at 2:19, Darren Duncan wrote:
* a Tuple is an associative array having one or more Attributes,
and each Attribute has a name or ordinal position and it is typed
according to a Domain;
this is like a restricted Hash in a way, where each key has a
specific type
* a
Darren Duncan schreef:
If you take ...
+-+-+
|a|x|
|a|y|
|a|z|
|b|x|
|c|y|
+-+-+
... and divide it by ...
+-+
|x|
|z|
+-+
... the result is ...
+-+
|a|
+-+
I'm not sure if Divide has an equivalent in SQL.
A verbose way to do it:
SELECT
Darren Duncan wrote:
As an addendum to what I said before ...
...
I would want the set operations for tuples to be like that, but the
example code that Luke and I expressed already, with maps and greps etc,
seems to smack too much of telling Perl how to do the job.
I don't want to have to
[snip entire conversation so far]
(Please bear with me - I'm going to go in random directions.)
Someone please correct me if I'm wrong, but it seems that there's only
a few things missing in P6:
1) An elegant way of creating a tuple-type (the table, so to speak)
2) A way of providing
Ruud H.G. van Tol schreef:
[RD-interface]
See also these Haskell Hierarchical Libraries (base package)
http://www.haskell.org/ghc/docs/latest/html/libraries/base/Data-Set.html
http://www.haskell.org/ghc/docs/latest/html/libraries/base/Data-Map.html
--
Affijn, Ruud
Gewoon is een tijger.
All,
P.S. What follows is rough and will be smoothed out or reworked.
I propose, perhaps redundantly, that Perl 6 include a complete set of
native language constructs for a relational data model, akin to that
introduced in E. F. Codd's classic paper, A Relational Model of Data
for Large
On 12/15/05, Darren Duncan [EMAIL PROTECTED] wrote:
I propose, perhaps redundantly, that Perl 6 include a complete set of
native
Okay, I'm with you here. Just please stop saying native and core.
Everyone.
rant
Remember, syntax in Perl 6 can be stuffed in a library like anything
else. You
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