I’m trying to use @weekly to represent attendance for each week of the month. I wanted to use a bit for each week, but am having no luck finding a way to get a single bit out of the variable after it is set. I already have this code to set the values:
@mask = (2 ** @week_number)
params['household']['visit']['weekly'] = (@mask && @thisweek)
Please help…
Bob bsm2th@gmail.com
I’m trying to use @weekly to represent attendance for each week of the month. I wanted to use a bit for each week, but am having no luck finding a way to get a single bit out of the variable after it is set. I already have this code to set the values:
@mask = (2 ** @week_number) params['household']['visit']['weekly'] = (@mask && @thisweek)Please help…
Bob bsm2th@gmail.com
Well, Integers support bit operations.
weekly = 0
=> 0
weekly[4]
=> 0
weekly |= 1 << 4
=> 16
weekly[4]
=> 1
weekly.class
=> Fixnum
weekly |= 1 << 52
=> 4503599627370512
weekly.class
=> Bignum
weekly.to_s(2)
=> “10000000000000000000000000000000000000000000000010000”
Note that bit0 is the least significant.
-Rob
Rob Biedenharn http://agileconsultingllc.com