Guess the formula to transform strings as follows:
'Hello World!' --> 'Ifmmp Xpsme!'
'Can I help you?' --> 'Dbo J ifmq zpv?'
Simple and interesting.
Swap two numbers
Perfect Square or not
Create a vector
Flexible Anonymous Function
Create an 'arrow-head" matrix
Apply a function array to an array of numbers
Count up then down
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