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by Evgeniy Sharapov :: Rate this Message:

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On Wed, Mar 28, 2007 at 11:00 PM, <general-request@...> wrote:

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> Today's Topics:
>
> 1. Re: New to J - Hello (ramacd)
> 2. Extended precision (eacloughatt@...)
> 3. Re: Extended precision (Roger Hui)
> 4. Re: Extended precision (Raul Miller)
> 5. RE: Cookies with JHP (Sherlock, Ric)
> 6. Re: ;: -- is the word separator parameterizable? (Mark D. Niemiec)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 28 Mar 2007 18:23:33 -0300
> From: "ramacd" <ramacd@...>
> Subject: Re: [Jgeneral] New to J - Hello
> To: "General forum" <general@...>
> Message-ID: <047001c7717f$5718b210$0202a8c0@ram>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Terrence;
>
> I just have to state that that is the first time in the decade and a half
> that I've been exposed to J that I've ever heard J characterized as _more_
> readable than APL. I'm curious as to how you conclude that.
>
> ------------------------------------------------------------------------
> |\/| Randy A MacDonald | APL: If you can say it, it's done.. (ram)
> |/\| ramacd@... |
> |\ | | The only real problem with APL is that
> BSc(Math) UNBF'83 | it is "still ahead of its time."
> Sapere Aude | - Morten Kromberg
> Natural Born APL'er | Demo website: http://156.34.78.235/
> -----------------------------------------------------(INTP)----{ gnat }-
>
> ----- Original Message -----
> From: "Terrence Brannon" <metaperl.j@...>
> To: "General forum" <general@...>
> Sent: Wednesday, March 28, 2007 12:42 PM
> Subject: [Jgeneral] New to J - Hello
>
>
> > On 3/28/07, Dan Bron <jf@...> wrote:
> >
> >
> > > Though, in retrospect, since Terrence is new to J (I assume),
> >
> > new for a second time. I keep wondering about it. It's easier to get
> > into than kX and kdb. It's more readable than APL. It's more terse
> > than haskell (I always start losing in Haskell when it gets to
> > monads).
> >
> > I do a lot of data crunching: I take csv, xml, fixed-width files and
> > commit such data to SQL databases. And sometimes spreadsheets. So, I'm
> > just playing with J to see what it can offer a
> > Perl/Python/soon-to-be-Java guy.
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
>
>
>
> ------------------------------
>
> Message: 2
> Date: Thu, 29 Mar 2007 00:43:58 +0100 (GMT+01:00)
> From: "eacloughatt@..." <eacloughatt@...>
> Subject: [Jgeneral] Extended precision
> To: general@...
> Message-ID: <9434439.1175125438248.JavaMail.root@ps29>
> Content-Type: text/plain;charset="UTF-8"
>
> NB. When looking at some of the 'Euler Project' problems
> NB. I came across the following:
>
> ]a=.50#'1'
> 11111111111111111111111111111111111111111111111111
> x:".a
> 11111111111111110805019569335803527359330256945152
> x:".50#'2'
> 22222222222222221610039138671607054718660513890304
> x:".50#'3'
> 33333333333333332415058708007410582077990770835456
>
> NB. I suspect that the limit of precision is related to
> NB. the fact that I have a 32 bit computer but, not knowing
> NB. much about the mechanics of the thing, I am intrigued by
> NB. the apparent reproducibility of the result (under both
> NB. Windows and Ubuntu linux) and on the relationship between
> NB. the first 16 digits and the remainder.
>
> NB. Can anyone enlighten me?
>
> NB. Is there any way of getting the 'correct' answer?
> NB. Suppose I want the first 50 digits of Pi?
>
> Regards,
>
> Eddie Clough.
>
>
>
>
>
> ___________________________________________________________
>
> Tiscali Broadband only £9.99 a month for your first 3 months!
> http://www.tiscali.co.uk/products/broadband/
>
>
> ------------------------------
>
> Message: 3
> Date: Wed, 28 Mar 2007 16:53:09 -0700
> From: Roger Hui <rhui000@...>
> Subject: Re: [Jgeneral] Extended precision
> To: General forum <general@...>
> Message-ID: <ce448240391c9.460a9d75@...>
> Content-Type: text/plain; charset=us-ascii
>
> Your expressions all produce a 64-bit IEEE
> floating point number first, and then converted
> it into extended precision. To avoid that,
> append an "x" to the string before executing it:
>
> ". 'x',~ 50#'1'
> 11111111111111111111111111111111111111111111111111
> ". 'x',~ 50#'2'
> 22222222222222222222222222222222222222222222222222
> ". 'x',~ 50#'3'
> 33333333333333333333333333333333333333333333333333
>
> <.@o. 10^50x
> 314159265358979323846264338327950288419716939937510
>
>
>
> ----- Original Message -----
> From: "eacloughatt@..." <eacloughatt@...>
> Date: Wednesday, March 28, 2007 4:43 pm
> Subject: [Jgeneral] Extended precision
>
> > NB. When looking at some of the 'Euler Project' problems
> > NB. I came across the following:
> >
> > ]a=.50#'1'
> > 11111111111111111111111111111111111111111111111111
> > x:".a
> > 11111111111111110805019569335803527359330256945152
> > x:".50#'2'
> > 22222222222222221610039138671607054718660513890304
> > x:".50#'3'
> > 33333333333333332415058708007410582077990770835456
> >
> > NB. I suspect that the limit of precision is related to
> > NB. the fact that I have a 32 bit computer but, not knowing
> > NB. much about the mechanics of the thing, I am intrigued by
> > NB. the apparent reproducibility of the result (under both
> > NB. Windows and Ubuntu linux) and on the relationship between
> > NB. the first 16 digits and the remainder.
> >
> > NB. Can anyone enlighten me?
> >
> > NB. Is there any way of getting the 'correct' answer?
> > NB. Suppose I want the first 50 digits of Pi?
> >
> > Regards,
> >
> > Eddie Clough.
>
>
> ------------------------------
>
> Message: 4
> Date: Wed, 28 Mar 2007 19:58:30 -0400
> From: "Raul Miller" <rauldmiller@...>
> Subject: Re: [Jgeneral] Extended precision
> To: "General forum" <general@...>
> Message-ID:
> <ae4ab8980703281658j246d7feboc31ee0d3684fb551@...>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> On 3/28/07, Roger Hui <rhui000@...> wrote:
> > ". 'x',~ 50#'1'
> > 11111111111111111111111111111111111111111111111111
>
> Note also that
> ".50#'1'
> displays using "scientific notation" (which J uses for
> display only for very large and very small numbers
> represented internally using IEEE floating point):
> 1.11111e49
>
> --
> Raul
>
>
> ------------------------------
>
> Message: 5
> Date: Thu, 29 Mar 2007 12:59:54 +1200
> From: "Sherlock, Ric" <R.G.Sherlock@...>
> Subject: RE: [Jgeneral] Cookies with JHP
> To: "General forum" <general@...>
> Message-ID:
> <ECBA357DDED63B4995F5C1F5CBE5B1E806ED31A3@...>
> Content-Type: text/plain; charset="us-ascii"
>
> Whew, thanks for your comments Oleg, I wasn't expecting such an
> enthusiastic reception. I'm just glad to be able to contribute
> something to the community which some of you give so much to.
>
> Thanks too for the new version of JHP ... things happen fast around
> here!
>
> On Behalf Of Oleg Kobchenko
> >
> > These are all great ideas ...
> [removed potentially undeserved praise ;-)]
>
> > There is a new version of JHP, available through JAL.
> > now features support for Cookies and POST params.
> http://olegykj.sourceforge.net/jhp/
>
>
>
> ------------------------------
>
> Message: 6
> Date: Wed, 28 Mar 2007 22:28:30 -0400 (EDT)
> From: "Mark D. Niemiec" <mniemiec@...>
> Subject: Re: [Jgeneral] ;: -- is the word separator parameterizable?
> To: general@...
> Message-ID:
> <
> 29902870.1175135311125.JavaMail.root@...>
>
> Content-Type: text/plain; charset=UTF-8
>
> Terrence Brannon <metaperl.j@...> wrote:
>
> > Is it possible to specify what the verb ;: will use to split the
> > string?
>
> Monadic ;: splits strings according to the specific rhematic rules
> of the J language, which is sometimes suitable as a quick hack, as in
> colors =: ;:'red green blue'
> but is generally not suitable for user-generrated data. You can use
> dyadic ;: to split a string according to any other criteria that a finite
> state machine can recognize (such as comma-delimited strings, ignoring
> commas within strings) but this is probably overkill for most applications.
>
> Much more suitable is ;. Typically, you can use <;._1 (which requires
> the delimiter to be at the front of the string), or <;._2 (which requires
> it at the end). You can also create a simple dyadic verb that takes two
> parameters - an arbitrary delimiter, and a delimited string which does
> not need a delimiter at either end:
> '/' <;._1@, 'this/is/a/string'
> +----+--+-+------+
> |this|is|a|string|
> +----+--+-+------+
>
> -- Mark D. Niemiec <mniemiec@...>
>
>
>
> ------------------------------
>
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
> End of General Digest, Vol 18, Issue 53
> ***************************************
>
>

--
==========================================
Evgeniy N. Sharapov
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm