1. RE: abs()
- Posted by Chris Bensler <bensler at nt.net>
Oct 25, 2004
-
Last edited Oct 26, 2004
FD(censored) wrote:
>
>
> hey i remember ages ago someone posted asking the quickest way to code
> an abs() function. The results were good, but a few who posted at the
> end of the thread posted very very efficient ways to do this in
> euphoria, which i cannot remember. I'm looking for speed here. Any help
> would be appreciated
>
>
I dunno about the fastest, but this beats most attempts..
global function abs(object x)
if atom(x) then
if x < 0 then return -x else return x end if
else
for i = 1 to length(x) do
if x[i] < 0 then x[i] = -x[i] end if
end for
end if
return x
end function
if you don't have to deal with sequences (which you likely do not), you
can optimize for atoms..
global function abs(atom a)
if a < 0 then return -a else return a end if
end function
Chris Bensler
Code is Alchemy
2. RE: abs()
- Posted by Chris Bensler <bensler at nt.net>
Oct 25, 2004
-
Last edited Oct 26, 2004
Chris Bensler wrote:
>
>
> FD(censored) wrote:
> >
> >
> > hey i remember ages ago someone posted asking the quickest way to code
> > an abs() function. The results were good, but a few who posted at the
> > end of the thread posted very very efficient ways to do this in
> > euphoria, which i cannot remember. I'm looking for speed here. Any help
> > would be appreciated
> >
> >
> I dunno about the fastest, but this beats most attempts..
>
> }}}
<eucode>
> global function abs(object x)
> if atom(x) then
> if x < 0 then return -x else return x end if
> else
> for i = 1 to length(x) do
> if x[i] < 0 then x[i] = -x[i] end if
> end for
> end if
> return x
> end function
> </eucode>
{{{
>
> if you don't have to deal with sequences (which you likely do not), you
> can optimize for atoms..
>
> }}}
<eucode>
> global function abs(atom a)
> if a < 0 then return -a else return a end if
> end function
> </eucode>
{{{
>
>
> Chris Bensler
> Code is Alchemy
>
Sorry, I forgot the Post Script.
PS.
If anybody can provide you with the most efficient algorithm, it will be
Jiri Babor. I suggest you draw his attention :)
Or even query him personally.
Chris Bensler
Code is Alchemy
3. RE: abs()
----- Original Message -----
From: FD(censored) <francis at gmx.co.uk>
To: <EUforum at topica.com>
Sent: Monday, October 25, 2004 5:31 PM
Subject: abs()
>
>
> hey i remember ages ago someone posted asking the quickest way to code an
abs() function. The results were good, but a few who posted at the end of
the thread posted very very efficient ways to do this in euphoria, which i
cannot remember. I'm looking for speed here. Any help would be appreciated
>
I have two commented versions of this routine in my "General Functions"
(GENFUNC.E) package.
Regards.
