test is a given integer number is Happy of not?
answer 1 if yes or 0 is no
sorry for that.
Summing Digits within Text
Back to basics 8 - Matrix Diagonals
Rotate a Matrix
Number of digits in an integer
Find the dimensions of a matrix
Is this number Munchhausen Narcissistic?
create numeric palindromes and their square roots
Convert a Cell Array into an Array
remove nans fast
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