HaloO,
On Thursday, 26. June 2008 18:46:25 Larry Wall wrote:
Neither is nor does is quite right here, because the mathematicians
have seen fit to confuse representation semantics with value semantics. :)
Hmm, but the uppercase types should hide the representation type.
IOW, there's only one
* Mark J. Reed [EMAIL PROTECTED] [2008-06-26 20:20]:
On Thu, Jun 26, 2008 at 1:31 PM, [EMAIL PROTECTED] wrote:
Most financial institutions don't use float, rational or
fixed point, they just keep integer pennies.
I'm not so sure about that. There are lots of financial
transactions that
* Aristotle Pagaltzis [EMAIL PROTECTED] [2008-06-29 02:05]:
[repeat of statements made days ago]
Sorry, I was only just catching up and didn’t notice this orphan
subthread had siblings, where the point was already covered.
Regards,
--
Aristotle Pagaltzis // http://plasmasturm.org/
Larry Wall wrote:
but probably what the financial insitutions
want is special fixed-point types that assume a divisor anyway.
Would any financial institution care to comment?
Some (VAT tax) computations are defined, by law, to be executed
with a cetain precision. You have to be able to
Larry Wall wrote:
On Thu, Jun 26, 2008 at 04:50:21PM +0200, Moritz Lenz wrote:
: I assume that 'Num' is meant to be a non-complex.
: Then it seems to make sense to assume:
: Int is Rat
: Rat is Num
: Num is Complex
: or am I off again?
Well, there's this little thing called Liskov
This is a more or less random collection of thoughts and questions about
the rakudo testing infrastructure.
First of all I feel that it's in a rather good shape.
I put up a chart of number of tests on http://rakudo.de/ and plan to
update it regularly (via cron job once the admin installs
On Thu, Jun 26, 2008 at 11:36:05AM +0200, Moritz Lenz wrote:
This is a more or less random collection of thoughts and questions about
the rakudo testing infrastructure.
First of all I feel that it's in a rather good shape.
I agree -- it's looking better all of the time. Many thanks to
you,
Patrick R. Michaud wrote:
On Thu, Jun 26, 2008 at 11:36:05AM +0200, Moritz Lenz wrote:
[...] it would be useful to have an option that makes localtest more
verbose. Specifically if a script dies, it's not obvious after which
test it died.
I'm not exactly sure what is meant here -- do you
On Thu, Jun 26, 2008 at 11:36:05AM +0200, Moritz Lenz wrote:
There seems to be a thorough confusion about numeric types. for example
some tests read like this: is (1.1).WHAT, 'Num'; and then in a different
file is (1.1).WHAT, 'Rat'; That raises two questions for me
1) should we test for the
(cross-posting to p6l)
Ryan Richter wrote:
On Thu, Jun 26, 2008 at 11:36:05AM +0200, Moritz Lenz wrote:
2) How do we know which numeric type is a class and which is a role? Is
there an explicit spec about the types of number literals? That could
have some impact on type checking in the
On Thu, Jun 26, 2008 at 10:23 AM, Moritz Lenz
[EMAIL PROTECTED] wrote:
Thanks for the effort, but it also raises new questions. For example:
Int is Num
Rakudo doesn't do it that way, because the 'A is B' relation in OO means
Every instance of A is also an Instance of B, which certainly isn't
Mark J. Reed wrote:
On Thu, Jun 26, 2008 at 10:23 AM, Moritz Lenz
[EMAIL PROTECTED] wrote:
Thanks for the effort, but it also raises new questions. For example:
Int is Num
Rakudo doesn't do it that way, because the 'A is B' relation in OO means
Every instance of A is also an Instance of B,
In a message dated Thu, 26 Jun 2008, Moritz Lenz writes:
I assume that 'Num' is meant to be a non-complex.
Then it seems to make sense to assume:
Int is Rat
Rat is Num
Num is Complex
or am I off again?
S29 seems to have been assuming this, if I'm reading the multis correctly.
--
Trey Harris
Trey Harris wrote:
In a message dated Thu, 26 Jun 2008, Moritz Lenz writes:
I assume that 'Num' is meant to be a non-complex.
Then it seems to make sense to assume:
Int is Rat
Rat is Num
Num is Complex
or am I off again?
S29 seems to have been assuming this, if I'm reading the multis
On Thu, Jun 26, 2008 at 10:40:53AM -0400, Trey Harris wrote:
In a message dated Thu, 26 Jun 2008, Moritz Lenz writes:
I assume that 'Num' is meant to be a non-complex.
Then it seems to make sense to assume:
Int is Rat
Rat is Num
Num is Complex
or am I off again?
S29 seems to have been
On Thu, Jun 26, 2008 at 04:50:21PM +0200, Moritz Lenz wrote:
What's the alternative?
I don't think it's a good idea to special-case numeric types, and I
don't think it's a good idea to define multis for each numeric type either.
I assume that 'Num' is meant to be a non-complex.
Then it
Moritz Lenz 3.14 would be a Rat or a Float or whatever
That's a good question, actually. Does the literal 3.14 get turned
into a Float or a Rat? Float is probably simplest, and matches what
e.g. Lisp does, but you could argue either way. Especially since many
exact decimal literals become
On Thu, Jun 26, 2008 at 04:50:21PM +0200, Moritz Lenz wrote:
: I assume that 'Num' is meant to be a non-complex.
: Then it seems to make sense to assume:
: Int is Rat
: Rat is Num
: Num is Complex
: or am I off again?
Well, there's this little thing called Liskov substitutability...
Neither is
On Thu, Jun 26, 2008 at 12:45:39PM -0400, Mark J. Reed wrote:
: Moritz Lenz 3.14 would be a Rat or a Float or whatever
:
: That's a good question, actually. Does the literal 3.14 get turned
: into a Float or a Rat? Float is probably simplest, and matches what
: e.g. Lisp does, but you could
On Thu, Jun 26, 2008 at 09:55:09AM -0700, Larry Wall wrote:
We could go as far as to guarantee that Nums do rational arithmetic
out to a certain point, but probably what the financial insitutions
want is special fixed-point types that assume a divisor anyway.
Would any financial institution
RR == Ryan Richter [EMAIL PROTECTED] writes:
RR On Thu, Jun 26, 2008 at 09:55:09AM -0700, Larry Wall wrote:
We could go as far as to guarantee that Nums do rational arithmetic
out to a certain point, but probably what the financial insitutions
want is special fixed-point types that
Most financial institutions don't use float, rational or fixed point, they just
keep integer pennies.
--
Mark Biggar
[EMAIL PROTECTED]
[EMAIL PROTECTED]
[EMAIL PROTECTED]
-- Original message --
From: Larry Wall [EMAIL PROTECTED]
Would any financial institution
On Thu, Jun 26, 2008 at 09:46:25AM -0700, Larry Wall wrote:
: the VM somehow sneaks in the appropriate conversion for us if we
: actually try to pass an Int to a Rat.
I'd point out that this is fundamentally the same decision point that
is reached when we want to do boxing, because we basically
On Thu, Jun 26, 2008 at 1:31 PM, [EMAIL PROTECTED] wrote:
Most financial institutions don't use float, rational or fixed point, they
just keep integer pennies.
I'm not so sure about that. There are lots of financial transactions
that deal in sub-$0.01 fractions: taxes, currency conversion,
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