JavaScript sample tests do not import chai.

JavaScript should be updated to Node 18 and use chai.
Updated in this fork

Not a bug. Since this Kata is still using Node v8, the sort is not stable, as this was not required at the time.
Since ECMAScript version 10 (ES2019), the specification dictates that Array.prototype.sort must be stable (preserve order). This was introduced to Node with version 12.

Modern browsers usually adhere to the newest specification, but it's good to keep in mind that programming only for the newest specification might break stuff for older browsers/systems.

JavaScript fork (author gone)

• Updated to Node 18 and chai
• Tests are now in line with the description (resolves this issue)
  • Backwards compatible, so old solutions will not be invalidated
• Does not address this issue, as per my comment.

O(1) formulas are only approximations for this problem. I don't see why solutions with an inaccuracy as high as 0.01 should be allowed.

added

approved

Seems like a floating-point error. The tests should probably be changed to allow for precision errors (e.g. using assert.approximately instead of assert.strictEqual).

Yeah, I was unsure about that. Adding it would invalidate basically every solution, as the tests did not work before.

I could add negative tests that expect undefined or an error, which would allow for those solution to stay up.

Fixed

JavaScript fork (author inactive)

• Changed assertion messages (resolves this issue)
• Updated to Node 18 and chai
• Added a sample test that addresses this issue

Your random tests don't generate negative numbers.

The Go translation is incorrect. It's mentioned in this open issue, but nobody has fixed it yet.

approved

Resolved with this update