Sum of diagonal of a square matrix
The Answer to Life, the Universe, and Everything
Create an index-powered vector
Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock.
Return the 3n+1 sequence for n
Renaming a field in a structure array
Remove any row in which a NaN appears
Which doors are open?
Extract leading non-zero digit
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