5 ms·

Helps how?

• raverbashing 6y ago
  Wrapping around the array, you just need for your position to be i%len Though ok, reading an array backwards requires a len-1-i
  • IlliOnato 6y ago
    Why would you need to "wrap around" an array? I guess it's helpful if you use an array to represent a cyclic group, but how often this happens in practice? And when you need the number of the last element, you need to do A[n-1], which is "less helpful", I guess.
    • raverbashing 6y ago
      I think both those cases happen with a certain frequency, yes, your last element is a bit trickier, though in Python it is represented by A[-1] (so that would turn into A[len-1]) Yeah, maybe there's no fundamental advantage, one would have to check the most common cases. > Why would you need to "wrap around" an array? Ring buffers
    • secondcoming 6y ago
      Ringbuffers are used all over
  • hmry 6y ago
    Or alternatively, len + ~i Okay, maybe don't use that one in production :)