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Re^3: getting next 5 files according to hour

by pemungkah (Priest)
on Feb 21, 2012 at 16:42 UTC ( #955352=note: print w/replies, xml ) Need Help??

in reply to Re^2: getting next 5 files according to hour
in thread getting next 5 files according to hour

Modular arithmetic might be a new concept, so I'll outline it very briefly.

In modular arithmetic, all numbers are reduced to a smaller cyclic subset of integers by the process of dividing by the modulus and taking the remainder. So if you count modulo four starting at zero, you begin normally: 0, 1, 2, 3 When you reach 4, the modulus, you go back to zero, because 4 divided by 4 is 1, with remainder 0. So this restarts the cycle.

For your problem, the hours of the day are modulo 24 - and you can probably see how this applies from there.

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Re^4: getting next 5 files according to hour
by shekarkcb (Beadle) on Feb 22, 2012 at 08:50 UTC
    Thank you all for the reply.


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