Level Extreme platform
Subscription
Corporate profile
Products & Services
Support
Legal
Français
Formula for converting multi choice into a number
Message
 
 
To
29/11/2012 09:22:33
General information
Forum:
Visual FoxPro
Category:
Other
Environment versions
Visual FoxPro:
VFP 9 SP1
Miscellaneous
Thread ID:
01558333
Message ID:
01558575
Views:
61
This suggestion has been incredibly helpful. Now instead of using X number of fields I can use just ONE field!
Thank you again!

>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?
"The creative process is nothing but a series of crises." Isaac Bashevis Singer
"My experience is that as soon as people are old enough to know better, they don't know anything at all." Oscar Wilde
"If a nation values anything more than freedom, it will lose its freedom; and the irony of it is that if it is comfort or money that it values more, it will lose that too." W.Somerset Maugham
Previous
Next
Reply
Map
View

Click here to load this message in the networking platform