Given input A, return all but the first and last elements, arranged as a column vector. (I.e., all dimensions after the first should be singleton.)
The test suite should include a two element input also, for the sake of completion!
Why are several y_correct vectors not column vector as required by the problem?
The leading solution without the regexp hack: 19.
Find relatively common elements in matrix rows
Flip the vector from right to left
Make a half wave rectifier
Set a diagonal
Matrix indexing with two vectors of indices
Key Generation for Solitaire Cipher
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