Permute diagonal and antidiagonal
For example [1 2 3;4 5 6;7 8 9] -> [3 2 1;4 5 6;9 8 7]
WITHOUT diag function (and variable name)
"max(...)" is clever!
DNA N-Gram Distribution
Compute Fibonacci Number
Rounding off numbers to n decimals
Magic is simple (for beginners)
Find files with extension ext in the current directory
Two functions (to be sure)
Mysterious digits operation (easy)
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