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RE: [CF-Talk] Random Images-Resources for Information?Use the randomize()
function to seed the rand number generator. Page 489 of the CF 4.5 language
reference manual.
<cfscript>
randomize(timeformat(now(),"SSHHMM"));
</cfscript>
Just to put an integer in as the seed value. The randomize() function
returns a number between 0 and 1 but it is not "random" according to the
docs.
There are similar functions in other languages (basic, c, etc.)
DC
-------------------
David E. Crawford
Director, Internet Development
Yale Security Group, Inc.
-----Original Message-----
From: Mark Warrick [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, September 20, 2000 11:15
To: [EMAIL PROTECTED]
Subject: RE: [CF-Talk] Random Images-Resources for Information?
Curious. What do you mean by seed?
--------------------------------------------------------------
Mark Warrick
Phone: (714) 547-5386
Efax.com Fax: (801) 730-7289
Personal Email: [EMAIL PROTECTED]
Personal URL: http://www.warrick.net
Business Email: [EMAIL PROTECTED]
Business URL: http://www.fusioneers.com
ICQ: 346566
--------------------------------------------------------------
> -----Original Message-----
> From: Jim McAtee [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, September 20, 2000 3:01 AM
> To: [EMAIL PROTECTED]
> Subject: Re: [CF-Talk] Random Images-Resources for Information?
>
>
> Depends what you're thinking when you say random. If you mean calling
> the function 7 times always pulls up 7 different numbers, then that is
> NOT a random sequence. By chance (err... 'randomness') you could
> conceivably pull up the same number 7 times in a row (or a hundred times
> in a row). You'd sit there and say "This isn't random", but it's just a
> 'streak' of good/bad/neither luck that this strange sequence ocurred.
>
> One other thing, mostly unrelated to the above. The way computers
> usually generate random numbers is by pulling numbers out of a large,
> stored table (containing, you guessed it, random numbers). You should
> always seed the random number generator before you use it the first
> time, so that the sequence doesn't always start in the same place within
> the table. If you don't do this, you may notice the same sequence of
> numbers every time the program runs.
>
> Jim
>
>
> -----Original Message-----
> From: Les Mizzell <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
> Date: Wednesday, September 20, 2000 3:35 AM
> Subject: RE: [CF-Talk] Random Images-Resources for Information?
>
>
> >Thanks - will try this and see what happens.
> >
> >What nobody has told me yet though...is WHY *DOESN'T* "<cfparam
> >name="imageswap" default="#randrange(1,7)#">" return 1 through 7
> randomly?
> >
> >Les Mizzell
> >***********
> >Some people say I'm too apathetic.
> >But why should I care?
>
>
> ------------------------------------------------------------------
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_talk or send a message to [EMAIL PROTECTED] with
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<HTML><HEAD><TITLE>RE: [CF-Talk] Random Images-Resources for =
Information?</TITLE>
<META content=3D"text/html; charset=3Diso-8859-1" =
http-equiv=3DContent-Type>
<META content=3D"MSHTML 5.00.3018.900" name=3DGENERATOR></HEAD>
<BODY>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D815542213-20092000>Use=20
the randomize() function to seed the rand number generator. Page =
489 of=20
the CF 4.5 language reference manual. </SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D815542213-20092000></SPAN></FONT> </DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D815542213-20092000><cfscript></SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D815542213-20092000>randomize(timeformat(now(),"SSHHMM"));</SPAN><=
/FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D815542213-20092000></cfscript></SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D815542213-20092000></SPAN></FONT> </DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D815542213-20092000>Just=20
to put an integer in as the seed value. The randomize() function =
returns a=20
number between 0 and 1 but it is not "random" according to the=20
docs.</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D815542213-20092000></SPAN></FONT> </DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D815542213-20092000>There=20
are similar functions in other languages (basic, c, =
etc.)</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D815542213-20092000></SPAN></FONT> </DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D815542213-20092000>DC</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D815542213-20092000>
<P><FONT size=3D2>-------------------<BR>David E. Crawford<BR>Director, =
Internet=20
Development<BR>Yale Security Group, Inc. </FONT></P></SPAN></FONT></DIV>
<BLOCKQUOTE style=3D"MARGIN-RIGHT: 0px">
<DIV align=3Dleft class=3DOutlookMessageHeader dir=3Dltr><FONT =
face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B> Mark Warrick=20
[mailto:[EMAIL PROTECTED]]<BR><B>Sent:</B> Wednesday, September 20, =
2000=20
11:15<BR><B>To:</B> [EMAIL PROTECTED]<BR><B>Subject:</B> RE: =
[CF-Talk]=20
Random Images-Resources for Information?<BR><BR></DIV></FONT>
<P><FONT size=3D2>Curious. What do you mean by seed?</FONT> </P>
<P><FONT=20
=
size=3D2>--------------------------------------------------------------</=
FONT>=20
<BR><FONT size=3D2>Mark Warrick</FONT> <BR><FONT size=3D2>Phone: (714) =
547-5386</FONT> <BR><FONT size=3D2>Efax.com Fax: (801) 730-7289</FONT> =
<BR><FONT=20
size=3D2>Personal Email: [EMAIL PROTECTED]</FONT> <BR><FONT =
size=3D2>Personal URL:=20
<A href=3D"http://www.warrick.net" =
target=3D_blank>http://www.warrick.net</A>=20
</FONT><BR><FONT size=3D2>Business Email: [EMAIL PROTECTED]</FONT> =
<BR><FONT=20
size=3D2>Business URL: <A href=3D"http://www.fusioneers.com"=20
target=3D_blank>http://www.fusioneers.com</A></FONT> <BR><FONT =
size=3D2>ICQ:=20
346566</FONT> <BR><FONT=20
=
size=3D2>--------------------------------------------------------------</=
FONT>=20
</P><BR>
<P><FONT size=3D2>> -----Original Message-----</FONT> <BR><FONT =
size=3D2>>=20
From: Jim McAtee [<A=20
=
href=3D"mailto:[EMAIL PROTECTED]">mailto:[EMAIL PROTECTED]<=
/A>]</FONT>=20
<BR><FONT size=3D2>> Sent: Wednesday, September 20, 2000 3:01 =
AM</FONT>=20
<BR><FONT size=3D2>> To: [EMAIL PROTECTED]</FONT> <BR><FONT =
size=3D2>> Subject: Re: [CF-Talk] Random Images-Resources for=20
Information?</FONT> <BR><FONT size=3D2>> </FONT><BR><FONT =
size=3D2>>=20
</FONT><BR><FONT size=3D2>> Depends what you're thinking when you =
say=20
random. If you mean calling</FONT> <BR><FONT size=3D2>> the =
function 7=20
times always pulls up 7 different numbers, then that is</FONT> =
<BR><FONT=20
size=3D2>> NOT a random sequence. By chance (err... =
'randomness') you=20
could</FONT> <BR><FONT size=3D2>> conceivably pull up the same =
number 7 times=20
in a row (or a hundred times</FONT> <BR><FONT size=3D2>> in a =
row). =20
You'd sit there and say "This isn't random", but it's just a</FONT> =
<BR><FONT=20
size=3D2>> 'streak' of good/bad/neither luck that this strange =
sequence=20
ocurred.</FONT> <BR><FONT size=3D2>> </FONT><BR><FONT size=3D2>> =
One other=20
thing, mostly unrelated to the above. The way computers</FONT> =
<BR><FONT=20
size=3D2>> usually generate random numbers is by pulling numbers =
out of a=20
large,</FONT> <BR><FONT size=3D2>> stored table (containing, you =
guessed it,=20
random numbers). You should</FONT> <BR><FONT size=3D2>> =
always seed the=20
random number generator before you use it the first</FONT> <BR><FONT=20
size=3D2>> time, so that the sequence doesn't always start in the =
same place=20
within</FONT> <BR><FONT size=3D2>> the table. If you don't do =
this, you=20
may notice the same sequence of</FONT> <BR><FONT size=3D2>> numbers =
every=20
time the program runs.</FONT> <BR><FONT size=3D2>> </FONT><BR><FONT =
size=3D2>> Jim</FONT> <BR><FONT size=3D2>> </FONT><BR><FONT =
size=3D2>>=20
</FONT><BR><FONT size=3D2>> -----Original Message-----</FONT> =
<BR><FONT=20
size=3D2>> From: Les Mizzell <[EMAIL PROTECTED]></FONT> =
<BR><FONT=20
size=3D2>> To: [EMAIL PROTECTED]=20
<[EMAIL PROTECTED]></FONT> <BR><FONT size=3D2>> Date: =
Wednesday, September 20, 2000 3:35 AM</FONT> <BR><FONT size=3D2>> =
Subject:=20
RE: [CF-Talk] Random Images-Resources for Information?</FONT> =
<BR><FONT=20
size=3D2>> </FONT><BR><FONT size=3D2>> </FONT><BR><FONT =
size=3D2>>=20
>Thanks - will try this and see what happens.</FONT> <BR><FONT =
size=3D2>>=20
></FONT> <BR><FONT size=3D2>> >What nobody has told me yet =
though...is=20
WHY *DOESN'T* "<cfparam</FONT> <BR><FONT size=3D2>> =
>name=3D"imageswap"=20
default=3D"#randrange(1,7)#">" return 1 through 7</FONT> <BR><FONT=20
size=3D2>> randomly?</FONT> <BR><FONT size=3D2>> ></FONT> =
<BR><FONT=20
size=3D2>> >Les Mizzell</FONT> <BR><FONT size=3D2>>=20
>***********</FONT> <BR><FONT size=3D2>> >Some people say I'm =
too=20
apathetic.</FONT> <BR><FONT size=3D2>> >But why should I =
care?</FONT>=20
<BR><FONT size=3D2>> </FONT><BR><FONT size=3D2>> =
</FONT><BR><FONT=20
size=3D2>>=20
=
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