Guess the formula to transform strings as follows:
'Hello World!' --> 'Ifmmp Xpsme!'
'Can I help you?' --> 'Dbo J ifmq zpv?'
Simple and interesting.
Number of Circles in a Number
Return the Fibonacci Sequence
String substitution, sub problem to cryptoMath
Rotate a Matrix by 90 degrees
Apply a function array to an array of numbers
Two-output anonymous function?
Replace multiples of 5 with NaN
Count up then down
Get ranks of values in a vector
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