Given an array, return the cumulative difference.
a = [ 1 3 5 7 ]
cumdiff = [ 1 2 1 -2 ]
Get the area codes from a list of phone numbers
Back to basics 8 - Matrix Diagonals
Find the hypotenuse
02 - Vector Variables 4
Find and replaces spaces from a input string with *
Matrix rotation as per given angle
Find my birthday
Given an input string, generate a variable name out of it
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