test is a given integer number is Happy of not?
answer 1 if yes or 0 is no
sorry for that.
Back and Forth Rows
Remove any row in which a NaN appears
Basic arrays operations.
Remove the Zero
Tony's trick for duplicating an mx1 vector n times
Convert a Cell Array into an Array
remove nans fast
Strange Number Algorithms
Create numeric palindromes and their square roots
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