Covering some basic topics I haven't seen elsewhere on Cody.
Given an input vector of numbers, output a square array with the vector as the main diagonal and all other elements = 0.
1 0 0 0
0 2 0 0
0 0 3 0
0 0 0 4
Swap the first and last columns
Get the area codes from a list of phone numbers
Back to basics 12 - Input Arguments
Back to basics 17 - white space
Fill a zeros matrix
Valid Chess Moves
Back to basics 13 - Input variables
Back to basics 15 - Benchmark
Back to basics 2 - Function Path
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