Given a number, return the number of closed 'circles' in the base 10 numerical representation.
Note: the number 4 has no circles
8819 -> 5
Interpolating on a string (the ASCII values) is an interesting idea even though the long interpolation string could be reduced by subtracting '0', but at the expense of a "longer" solution.
Back and Forth Rows
Back to basics 12 - Input Arguments
Reindex a vector
Colon operator of two vectors
03 - Matrix Variables 4
Project Euler: Problem 16, Sums of Digits of Powers of Two
N-Dimensional Array Slice
Guess the Coefficients!
Roll the Dice!
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