1. This solution is much faster on re-invocation than the one without the persistent num_ones variable. Unless of course it is performed on a much larger (than num_ones) array of 32-bit integer.
2. It is essential to have the statement
The reason for this is that the floor() function has a problem with precision. If can fail with 32-bit integer that are close to 2^32.
For instance, consider this Matlab code and system response:
Remove the polynomials that have positive real elements of their roots.
Multiply 2 numbers
Simple Decoder Ring
Minimum Distance between two N-sided Polygons
GJam 2013 China Event: Happy Teams
R2012b atan in Degrees
Image Processing 002 : Fix Vignetting in a Visible Sensor
Mandelbrot Number Test [Real+Imaginary]
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