Re: Q: NaN again

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Re^2: Q: NaN again by kai (Initiate) on Oct 19, 2006 at 12:04 UTC
Problem in filtering of user input. For example. User try to make bid at auction, and enter NaN in "price" field. All standart methods like: $price = sprintf("%.2f", $price); return me NaN But it not so bad. Really bad is: `if ($price > $user_money) { return "You have not enough money". }` [download] Will fail for NaN. I found about 30 "nan holes" in my code after 5.8.4, and I suppose, I found not all of it. P.S. Sorry for my bad english.	[reply] [d/l]
Re^3: Q: NaN again by davorg (Chancellor) on Oct 19, 2006 at 12:14 UTC
Then, as you say, your problem is with filtering user input. When you recieve input from a user, you need to check that it is a valid number and reject (or ignore) it if it isn't. -- <http://dave.org.uk> "The first rule of Perl club is you do not talk about Perl club." -- Chip Salzenberg	[reply]
Re^4: Q: NaN again by kai (Initiate) on Oct 19, 2006 at 12:33 UTC
I have a huge amount of old code. About ten megabytes. I can't check all. So, all I need to know - how to disable NaN autosupport in perl 5.8.4+ for amd64 :-)	[reply]
Re^3: Q: NaN again by syphilis (Archbishop) on Oct 19, 2006 at 12:32 UTC
P.S. Sorry for my bad english That's ok ... no need to apologise for that. But it would really help if you could provide a complete (and simple) perl script that demonstrates one of the problems you are having. Support for NaN's does not exist in perl for all architectures/platforms. It would help us to know which architecture and platform you're running. Cheers, Rob	[reply]
Re^4: Q: NaN again by kai (Initiate) on Oct 19, 2006 at 12:38 UTC
`web # perl -e '$a="nan"; print sprintf("%.2f",$a)' nan web # perl -v This is perl, v5.8.8 built for x86_64-linux ----- For Win32: This is perl, v5.8.4 built for MSWin32-x86-multi-thread perl -e "$a='nan'; print sprintf('%.2f',$a)" 0.00` [download]	[reply] [d/l]
Re^5: Q: NaN again by syphilis (Archbishop) on Oct 19, 2006 at 13:31 UTC