C++ Translation

No tests, incomplete description

There should be repetitive cases that use the same function name in different instances of once to invalidate this solution

No tests, no explanations. If you don't know, you'll never decide.

Java translation (author inactive)

• Increased number of random tests.
• Increased upper bounds of inputs such that overflows can occur during the first multiplication or addition.

Suggest to add more complex initial tests:

show_and_test(&[(-5.0,-5.0), (5.0,-5.0), (0.0,5.0)], (0.0,0.0), true);
show_and_test(&[(0.0,5.0), (5.0,-5.0), (0.0,-2.0), (-5.0,-5.0)], (-3.0,-3.0), true);
show_and_test(&[(0.0,5.0), (5.0,-5.0), (0.0,-2.0), (-5.0,-5.0)], (-6.0,-3.0), false);

Scala translation

In shell, this kata only has a single test case, it needs more.

Random tests should also generate a certain non-zero amount of pairs of vowels.

Is it possible in this task to implement escaping the \ sign so that the resulting string contains \n as two characters in the string, and not the special character \n - "new line".

In the second test such a situation outputs. "N ffns bt,\nYr wrtng s mng th wrst 'v vr rd".

But in a real console it outputs:
"N ffns bt, (it's on a first line)
Yr wrtng s mng th wrst 'v vr rd (it's on a second line)"

Please review: C++ Translation

JS: No random test

If the original object is modified, its twin should reflect the changes.

What about the reverse? It's not specified whether the original objects should reflect changes from the twin objects.