Very creative usage of blkdiag in collaboration with conv2. I prefer nnz over "any" for speed and compactness.
Convert a numerical matrix into a cell array of strings
Create a patchwork matrix
Longest run of consecutive numbers
Lychrel Number Test (Inspired by Project Euler Problem 55)
Fangs of a vampire number
Create cell array of numeric arrays
Number of active Cody players by date
Determine which fields have been modified in a structure
The Python Challenge, Level 1: Decode strings
Pentago: find winning move
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