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Formula for converting multi choice into a number
Message
De
29/11/2012 09:44:09
 
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Versions des environnements
Visual FoxPro:
VFP 9 SP1
Divers
Thread ID:
01558333
Message ID:
01558341
Vues:
61
You're welcome.

>Thank you very much. I got it. (It used to be that one could not update a message if someone already replied to it. But this no longer works; at least not 100%).
>
>>I updated my answer, feel free to ask again if you don't understand the concept.
>>
>>>I believe you just answered my questions. So, first, thank you! The only thing I am not clear is how do you convert the stored sum into the choices? For example, if the stored number is 12. How would you convert this 12 into 4 and 8?
>>>
>>>>Why not use binary values?
>>>>
>>>>Choice 1 ---- 1
>>>>Choice 2 ---- 2
>>>>Choice 3 ---- 4
>>>>Choice 4 ---- 8
>>>>Choice 5 ---- 16
>>>>Choice 6 ---- 32
>>>>
>>>>Sum the values to store them. You can then easily retrieve which choices were selected.
>>>>
>>>>lnX = the sum
>>>>
>>>>To check if Choice 1 was selected : ?Bittest(lnX,0)
>>>>To check if Choice 2 was selected : ?Bittest(lnX,1)
>>>>To check if Choice 3 was selected : ?Bittest(lnX,2)
>>>>Note that the value after lnX is one lower than expected, since Bittest() is zero based.
>>>>
>>>>>Hi,
>>>>>
>>>>>I am looking for a formula (if possible) to convert a multiple choice(s) into a number. Kind of like the VFP Anchor property bit value works. Here is my example:
>>>>>Choice 1 ---- ##
>>>>>Choice 2 ---- ##
>>>>>Choice 3 ---- ##
>>>>>Choice 4 ---- ##
>>>>>Choice 5 ---- ##
>>>>>Choice 6 ---- ##
>>>>>
>>>>>Each choice above would have a number (##). Then when a user checks any number of choices (from 1 to 6), the "total" number is calculated. This "total" number should be unique for any combination of the selected choices. So that this number can be used (in reverse) to see what choices it represent.
>>>>>Any suggestions?
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