There might be an equation somewhere that you can use to calculate the distance between two points

Not quite sure where to start with this one.

1. 1.0 strictly equals 1 in JS. That is not a reason this test could be failing.
2. All numeric literals in JS are instances of Number. There in fact cannot be a difference between a floating-point representation of integers and "actual" integers without using BigInt - they are the same thing.
3. What is printed is generally irrelevant to passing tests on Codewars.
4. You can see there are over 1000 successful JS submissions, so it is clearly not true that the last test case will never be achieved.

console.log(1 === 1.0);
>> true

Not a kata issue, closing - and please double-check your issues before you raise them :)

In javascript the float "1.0" will be printed as just 1, the last test case never will be achieved

39 => 3.9

9 => 0.9

10 => 1 XXXX

I can't figure out how the distance is being calculated :C Any tips=

Thank you so much for your explanation and the function explaining it. I tested it and it worked with my assumptions in the way your functions explained. I shall look more into bitwise operations as well.

Now I can read it: does nobody notice the medium random tests in JS have a zero more than in Python? Josh even said so!

Not that it matters though. Node 8.x consistently fails my solution, even with 1e5; Node 14.x consistently passes my solution, even with 1e6.

the Node version is 8.x perhaps 14.x would be faster ? i just enabled it, if you want to try

For my naive solution, this immediately let me pass ..

You know as well as me how it works: it is a 7 kyu because beta testers ranked it 7 kyu.

I know. I don't know if they did that before or after the JS translation, and which language version they ranked.

i do not think it significantly improved performance either. i tried the solution from the top message above who reports a time out and it is still too slow. but it uses Array.splice() which i reckon is rather expensive because it must shift the array indices to the right of idx

the Node version is 8.x perhaps 14.x would be faster ? i just enabled it, if you want to try

If it's 7kyu, IMO more or less any naive solution should pass, in any language.

There is not even a good reason for tests with millions of numbers, or numbers of millions. What does that add, to a 7kyu kata ?!?

Yes, I think this issue is an Issue.

I've just tried to implement my original Python's solution in JS, and it times out. JS is usually much faster than Python, maybe Python list slicing implementation allows a fast execution here. That's beyond me. I don't know what should be done, but it appears that numbers ranges do match between languages and they are not the culprit. I'm not convinced this should be considered an issue, it's hard to find an exact equality between languages (very often Python slowness makes things harder in this language); not all naive solutions fail in JS.

That's what I would call naive, and it definitely times out in JS. Josh reports that the numbers don't match between Python and JS. Possibly someone added a zero somewhere.