[Jprogramming] Jfilesrc

bill lam bbill.lam at gmail.com
Sun Jan 8 15:19:30 HKT 2012 

Done.

However current jhs is inefficient in serving large files, if I understand
correctly.

Вск, 08 Янв 2012, William Szuch писал(а):
> Bill Lam
> 
> Your  correction will be OK.
> 
> Thanks
> Bill Szuch
> 
> -----Original Message-----
> From: programming-bounces at jsoftware.com
> [mailto:programming-bounces at jsoftware.com] On Behalf Of
> programming-request at jsoftware.com
> Sent: Sunday, 8 January 2012 3:00 PM
> To: programming at jsoftware.com
> Subject: Programming Digest, Vol 76, Issue 39
> 
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> Today's Topics:
> 
>    1. Re: Getting the diagonal of a square matrix (Papp Erik Tam?s)
>    2. Re: Indexed assignment must be slow? (Marc Simpson)
>    3. Re: Getting the diagonal of a square matrix (Don Guinn)
>    4. Re: Getting the diagonal of a square matrix (Alex Giannakopoulos)
>    5. jfilesrc (William Szuch)
>    6. Re: jfilesrc (bill lam)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Sat, 07 Jan 2012 11:36:01 +0100
> From: "Papp Erik Tam?s" <Papp.Erik at ybl.szie.hu>
> Subject: Re: [Jprogramming] Getting the diagonal of a square matrix
> To: Programming forum <programming at jsoftware.com>
> Message-ID: <f76f9cc7d193.4f082e21 at szie.hu>
> Content-Type: text/plain; charset=iso-8859-2
> 
> Hi,
> 
> Some example of getting the main diagonal of square matrices:
>     
>    ]A=:2 2$1 2 3 4
> 1 2
> 3 4
>    
>    (<0 1)|:A NB. The main diagonal of a square matrix A
> 1 4
>    
>    ]B=:3 3$1 2 3 4 5 6
> 1 2 3
> 4 5 6
> 1 2 3
>    
>    (<0 1)|:B NB. The main diagonal of a square matrix B
> 1 5 3
>    
>    ]N=:4 4$i. 16
>  0  1  2  3
>  4  5  6  7
>  8  9 10 11
> 12 13 14 15
>    
>    (<0 1)|:N NB. The main diagonal of a square matrix N
> 0 5 10 15
>    
> Regards,
> 
> Erik
>  ----- Eredeti lev?l (Original Message) -----
> Felad?: Alex Giannakopoulos <aegean at blueyonder.co.uk>
> D?tum: P?ntek, Janu?r 6, 2012 9:48 du
> T?rgy: [Jprogramming] Getting the diagonal of a square matrix
> C?mzett: Programming forum <programming at jsoftware.com>
> 
> > Hi
> > 
> > Is there a better (more efficient or whatever) way of getting the 
> > diagonal of a matrix than the simple multiplication I use below?
> > 
> > Say,
> > 
> >    randmat=. [: ? 0 $~,~
> >    idmat =. [:=i.
> >    randiag =. randmat * idmat
> > 
> > Many Thanks
> > -----------------------------------------------------------------
> > -----
> > For information about J forums see http://www.jsoftware.com/forums.htm
> > 
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Sat, 7 Jan 2012 12:19:27 +0000
> From: Marc Simpson <marc at 0branch.com>
> Subject: Re: [Jprogramming] Indexed assignment must be slow?
> To: Programming forum <programming at jsoftware.com>
> Message-ID:
> 	<CAMbwm8_5D6Lhexqw3iDKHoCJZ_CufhiBfRaxuT-=UvX9j2VGkw at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> 
> On Fri, Jan 6, 2012 at 11:42 PM, Alexander Mikhailov <avmich at yahoo.com>
> wrote:
> >
> > I'm not quite sure about this line -
> >
> > x=:55(3})(some verb returning a scalar)44(2})x
> >
> > If the verb returns a scalar - not a vector - then how 55 (3}) will work
> on the result of that verb?..
> >
> > May be this time I'm missing something?
> 
> I gather that something like this
> 
>    v =: >:
>    x =: 55 (3}) (v 44) (2}) x
> 
> was intended (at least, that's how I read it).
> 
> M
> 
> 
> ------------------------------
> 
> Message: 3
> Date: Sat, 7 Jan 2012 06:28:18 -0700
> From: Don Guinn <donguinn at gmail.com>
> Subject: Re: [Jprogramming] Getting the diagonal of a square matrix
> To: Programming forum <programming at jsoftware.com>
> Message-ID:
> 	<CAEcakcMVwVv5ivmjJtsotek+pUdizcUXZqvHrbLee8yYPu8c+Q at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
> 
>    i.3 3 3
>  0  1  2
>  3  4  5
>  6  7  8
> 
>  9 10 11
> 12 13 14
> 15 16 17
> 
> 18 19 20
> 21 22 23
> 24 25 26
>    (<0 1 2)|:i.3 3 3
> 0 13 26
>    (<0 1)|:i.3 3 3
> 0 12 24
> 1 13 25
> 2 14 26
> 
> 2012/1/7 "Papp Erik Tam?s" <Papp.Erik at ybl.szie.hu>
> 
> > Hi,
> >
> > Some example of getting the main diagonal of square matrices:
> >
> >   ]A=:2 2$1 2 3 4
> > 1 2
> > 3 4
> >
> >   (<0 1)|:A NB. The main diagonal of a square matrix A
> > 1 4
> >
> >   ]B=:3 3$1 2 3 4 5 6
> > 1 2 3
> > 4 5 6
> > 1 2 3
> >
> >   (<0 1)|:B NB. The main diagonal of a square matrix B
> > 1 5 3
> >
> >   ]N=:4 4$i. 16
> >  0  1  2  3
> >  4  5  6  7
> >  8  9 10 11
> > 12 13 14 15
> >
> >   (<0 1)|:N NB. The main diagonal of a square matrix N
> > 0 5 10 15
> >
> > Regards,
> >
> > Erik
> >  ----- Eredeti lev?l (Original Message) -----
> > Felad?: Alex Giannakopoulos <aegean at blueyonder.co.uk>
> > D?tum: P?ntek, Janu?r 6, 2012 9:48 du
> > T?rgy: [Jprogramming] Getting the diagonal of a square matrix
> > C?mzett: Programming forum <programming at jsoftware.com>
> >
> > > Hi
> > >
> > > Is there a better (more efficient or whatever) way of getting the 
> > > diagonal of a matrix than the simple multiplication I use below?
> > >
> > > Say,
> > >
> > >    randmat=. [: ? 0 $~,~
> > >    idmat =. [:=i.
> > >    randiag =. randmat * idmat
> > >
> > > Many Thanks
> > > -----------------------------------------------------------------
> > > -----
> > > For information about J forums see 
> > > http://www.jsoftware.com/forums.htm
> > >
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
> >
> 
> 
> ------------------------------
> 
> Message: 4
> Date: Sat, 7 Jan 2012 21:37:32 +0000
> From: Alex Giannakopoulos <aegean at blueyonder.co.uk>
> Subject: Re: [Jprogramming] Getting the diagonal of a square matrix
> To: Programming forum <programming at jsoftware.com>
> Message-ID:
> 	<CAD=R9JNAvoG4Cmg+kLjWyXiEoE6pm0mTK7Ygbc+25s0u+xYFsQ at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> 
> Yeah, great stuff that, Don, thanks.
> Could do with a fuller tutorial, though.
> Didn't find anything other than the 2 line description Might give it a go
> myself when I fully understand it.
> 
> On 7 January 2012 13:28, Don Guinn <donguinn at gmail.com> wrote:
> 
> >   i.3 3 3
> >  0  1  2
> >  3  4  5
> >  6  7  8
> >
> >  9 10 11
> > 12 13 14
> > 15 16 17
> >
> > 18 19 20
> > 21 22 23
> > 24 25 26
> >   (<0 1 2)|:i.3 3 3
> > 0 13 26
> >   (<0 1)|:i.3 3 3
> > 0 12 24
> > 1 13 25
> > 2 14 26
> >
> >
> 
> 
> ------------------------------
> 
> Message: 5
> Date: Sun, 8 Jan 2012 10:27:39 +1100
> From: "William Szuch" <bszuch at wsa-fincon.com.au>
> Subject: [Jprogramming] jfilesrc
> To: "J Programming Forum" <programming at jsoftware.com>
> Message-ID: <000001cccd93$f2299600$d67cc200$@wsa-fincon.com.au>
> Content-Type: text/plain;	charset="us-ascii"
> 
> Suggestion:
> 
> Include:
> 
> media/avi   avi
> 
> media/wmv wmv
> 
>  
> 
>  
> 
>  
> 
> Regards
> 
>  
> 
> Bill Szuch
> 
>  
> 
> 
> 
> ------------------------------
> 
> Message: 6
> Date: Sun, 8 Jan 2012 10:03:27 +0800
> From: bill lam <bbill.lam at gmail.com>
> Subject: Re: [Jprogramming] jfilesrc
> To: programming at jsoftware.com
> Message-ID: <20120108020327.GA2862 at debian.b2j>
> Content-Type: text/plain; charset=utf-8
> 
> I checked /etc/mime.types in my debian, there is no 'media' types.
> it contains lines
> 
> video/x-ms-wmv          wmv
> 
> video/x-msvideo         avi
> 
> will these be ok?  Which browsers expect the mime.type you describe?
> 
> ???, 08 ??? 2012, William Szuch ?????(?):
> > Suggestion:
> > 
> > Include:
> > 
> > media/avi   avi
> > 
> > media/wmv wmv
> > 
> >  
> > 
> >  
> > 
> >  
> > 
> > Regards
> > 
> >  
> > 
> > Bill Szuch
> > 
> >  
> > 
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
> 
> --
> regards,
> ====================================================
> GPG key 1024D/4434BAB3 2008-08-24
> gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3
> 
> 
> ------------------------------
> 
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
> 
> End of Programming Digest, Vol 76, Issue 39
> *******************************************
> 
> 
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm

-- 
regards,
====================================================
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