[cfaussie] Re: Strange calculation behavior on CF 7.02

Mon, 19 Feb 2007 19:15:54 -0800

Who's missing my point? One shouldn't have to worry about typing in Coldfusion. If in an evaluation a decimal is found amongst integers, it should still calculate correctly. Whether it does this by making the other values decimals, I don't care, but Coldfusion is a plain English language, and it not typed, there for if one reads <cfdump var="#1024-1024.1#"> as -0.1 I think that is what coldfusion should return.

Cheers
Gareth.

Ryan Sabir wrote:
Here's a technote from Sun, regarding Java.. the underlying subsystem of ColdFusion:
 
 
I wouldn't expect this to be in the CF documentation. It's not Adobe's problem.
From: cfaussie@googlegroups.com [mailto:cfaussie@googlegroups.com] On Behalf Of Gareth Edwards
Sent: Tuesday, 20 February 2007 1:42 PM
To: cfaussie@googlegroups.com
Subject: [cfaussie] Re: Strange calculation behavior on CF 7.02

Now.... you show me in the Coldfusion Documentation where this is outlined as a known issue?

Cheers
Gareth.

Ryan Sabir wrote:
 
Doesn't really matter why... Maybe there's a gremlin that lives in the last 0.0000000000015 of every floating point number. Every now and then he will wake up and mess up your number, and sometime's he'll stay asleep. Write your code expecting he might pop round for a visit, and he won't bother you.
 
If you really want to find out why, then you'll need to do some pretty hard core maths to work out how fractions are represented in binary. I prefer to leave that to the geeks who work at Intel and AMD while I get on with my work.

 
From: cfaussie@googlegroups.com [mailto:cfaussie@googlegroups.com] On Behalf Of Gareth Edwards
Sent: Tuesday, 20 February 2007 1:11 PM
To: cfaussie@googlegroups.com
Subject: [cfaussie] Re: Strange calculation behavior on CF 7.02

So why the mixed result?

Cheers
Gareth.

Ryan Sabir wrote:
Just remembered I had a 6.1 server lying around. And yes it did the same thing:
 
0.1
0.1
0.1
0.0999999999985
0.0999999999985
0.1
0.0999999999985
0.1
0.1
0.0999999999985
0.1
0.0999999999985
0.0999999999985
0.0999999999985
0.1
0.1
0.1








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