[Xerte] Re: Q for math heads

[Tom Reijnders]

If x is the number than the formula is:
Math.floor((x-1)/3) + 1
For 8 this is floor(7/3)+1 = 2+1=3

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Dave Burnett <d_b_burnett at hotmail.com> wrote:


I know what I want to do and could probably get it to work, but I suspect there is an elegant way to achieve this.

I need to figure out where an index falls in a grid of checkboxes.
ex:

5 questions, 3 possible answers for each question.
Looping through the checkboxes, left to right, top to bottom

1,2,3
4,5,6
7,8,9
10,11,12
13,14,15

What equation do I use to determine which set of answers 8 is in?

I think I would divide by 3, rounding up if there is a remainder?
		 	 		 


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