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IsNumeric
Chaz Longstaff
Registered User
Join date: 11 Oct 2006
Posts: 685
02-24-2009 17:41
I've seen a lot of great functions around for evaluating numbers in all various permutations, but I've been happy using the following one for simple needs with whole numbers, as I don't have to sacrifice half the script memory just to validate a number.

How do I make it work with negative whole numbers, though?

integer StringIsNumeric(string source) {
integer rval = 0;
if ( ( (float)source >= 1.175494351E-38) || (source == "0" ) )
rval = 1;
return rval;
}
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Thread attempting to compile a list of which animations are freebies, and which are not:

http://forums.secondlife.com/showthread.php?t=265609
Jesse Barnett
500,000 scoville units
Join date: 21 May 2006
Posts: 4,160
02-24-2009 18:23
EDIT: OK now I remember

CODE

default {
    state_entry()
    {
        llListen(77, "","","");
    }
    listen(integer channel, string name, key id, string message)
    {
        float test = (float)message;
        test = test * 2 / 2;
        if(test != 0)
            llOwnerSay("is a number");
        else
            llOwnerSay("is not a number");
        
    }
}
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Void Singer
Int vSelf = Sing(void);
Join date: 24 Sep 2005
Posts: 6,973
02-24-2009 18:45
lower your test limit to the max range for negative floats

EDIT:
all solutions are going to have caveats, except testing for characters including hex and scientific variations. doubling is good but will fail on anything that breaks the range limits. divide then multiply may work better (FURTHER EDIT: or not since you may run into the precision limit with that method... always caveats)
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Chaz Longstaff
Registered User
Join date: 11 Oct 2006
Posts: 685
02-25-2009 07:12
Many thanks all.
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Thread attempting to compile a list of which animations are freebies, and which are not:

http://forums.secondlife.com/showthread.php?t=265609