Please improve the test suite. There are two glaring problems. First, there is only one test case—it is recommended that at least three be provided, though more are often necessary to prevent hard-coded workarounds. Second, do not provide the solution in the test case(s). For such a problem, the answer should be calculated beforehand and provided as a predefined number to hide the solution. Furthermore, candidate functions can be checked against the solution using an adequate error bound (perhaps within 1E-3) rather than isequal().
radius of a spherical planet
Calculate distance travelled when given radius and rotations
Side of a rhombus
Sum the 'edge' values of a matrix
Remove the Zero
Replace 0 indices in array with 1's
Vector Element Multiplication
Find the mean of two vectors
More Simple String Concatenation
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