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:
Find the numeric mean of the prime numbers in a matrix.
Twins in a Window
Stuff the Board
Return the first and last characters of a character array
Side of a rhombus
Genome Sequence 002: Introductory DNA Sequencing (Flipped Segments)
Loading/Expanding a ZIP file from File Exchange
Mandelbrot Number Test [Real+Imaginary]
Crypto Addition - v01
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