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The kata does not assume the input matrix has an LU decomposition. Note that determining whether a square matrix has an LU decomposition is non-trivial, so either there should be handling if LU decomposition doesn't exist, or all inputs should guarantee to have one.
Modifying input will break the tests.
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Incorrect test framework usage in JS:
return Test.expect(isLowerTriangular(l, "L should be lower triangular"));should beTest.expect(isLowerTriangular(l), "L should be lower triangular");.Typo:
Missing random tests.
CoffeeScript translation kumited! Please Accept
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This kata could use some random tests.
Using
unitsis a little bit strange, since you're usingunitas a unit of measurement, not as "units of something", e.g. "The screen has 200 units of pixels" vs "A pixel is a unit of measurement". How about using the singular version instead?