Also could have
B I D X Q
> 1 1 1 1 1
*: 1
Henry Rich
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Roger Hui
> Sent: Wednesday, January 03, 2007 6:08 PM
> To: Programming forum
> Subject: Re: [Jprogramming] Special code for <. on integers?
>
> I am not sure that it is a Good Thing but it is
> (to quote a recent comment by a user) probably
> harmless, so I have tweaked the following cases
> of rank-0 monads:
>
> B I D X Q
> <. 1 1 1
> >. 1 1 1
> + 1 1 1 1 1
> * 1
> %: 1
> | 1
>
> The following benchmarks demonstrate the improvements:
>
> J6.02x
> x=: 1e6 [EMAIL PROTECTED] 2e9
> ts=: 6!:2 , 7!:[EMAIL PROTECTED]
> ts ']x'
> 2.05645e_6 512
> ts '<.x'
> 2.05962e_6 576
> ts '+x'
> 1.90164e_6 512
>
> J6.01:
> ts ']x'
> 1.89801e_6 512
> ts '<.x'
> 0.00571713 4.19488e6
> ts '+x'
> 0.00588315 4.19482e6
>
>
>
> ----- Original Message -----
> From: Henry Rich <[EMAIL PROTECTED]>
> Date: Wednesday, January 3, 2007 10:44 am
> Subject: [Jprogramming] Special code for <. on integers?
>
> > t =. ? 1000000 # 1000
> > ts '] t'
> > 4.21309e_6 640
> > ts '<. t'
> > 0.00720339 4.19494e6
> >
> > I am working on graphics display lists which need
> > to end up as integers. They sometimes turn to
> > floats when they are scaled, and then they have to
> > be turned back into integers. To accommodate all
> > the cases I have, I end up executing <. more times than
> > is really necessary.
> >
> > Wouldn't it be a Good Thing for <. and >. to be fast NOPs
> > (i. e. like ]) when applied to integer or Boolean arrays?
> >
> > I guess I can use <.^:(4 < 3!:0) but I still think the change
> > is worthwhile.
>
>
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