length!! and not "not isempty"... good point!
Right and wrong
Back to basics 18 - justification
Set the array elements whose value is 13 to 0
Find the index of the largest value in any vector X=[4,3,4,5,9,12,0,4.....5]
Two functions (to be sure)
Decrypt the cypher using XOR encryption (for beginners)
Numbers spiral diagonals (Part 1)
Magic is simple (for beginners)
How to reverse spdiags ?
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