Stack Arrays as Rows

easynumpy_combine

Implement stack_rows(arrays).

Given a list of k equal-length 1D arrays, return a 2D array of shape (k, n) whose row i is arrays[i]. No for/while loops.

Constraints

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Hint 1

np.vstack(arrays) (or np.stack(arrays, axis=0)) stacks 1D arrays into the rows of a 2D array.