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.
Remove all the consonants
Swap the input arguments
Back to basics 19 - character types
Back to basics 21 - Matrix replicating
Set a diagonal
Create a patchwork matrix
Matrix indexing with two vectors of indices
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