'Looks like you've solved it'

...

What's a linked list? (probably something in C++, not in JS )

splice and push are slowing it down. It looks like you have O(n^3) code almost.

First, can you figure out how to do it without splice?

man another amazing kata, thanks!

• Oooooh Boy, Michele Missed you Bro, remember Your Lengthy Solution in See You Next Happy Year , Hope You're Doing Well So, I've Saved/Kept Your Kind Words On My Pc FOREVER

I can't submit it for it times out, but it's probably my code that may well be written more efficiently, If you want to give me an advice

• Well, Your Most Recent Trained Language (JavaScript) is not in my ToolBox, But There are Some Fixed OutLines Even if the Language Changes :

• The Vector's/Array Size that Passed to the function contains 60.000 elements, the random Ones Contains 200 Assertions with 60.000 elements for each, Which Means, O(N log N) Solutions Will Only Pass.

• in (JS), Splice takes up to O(n) in its Worst Case, Hope This Help

• So, Mike, Try to reconsider the Posted Code, Tune it to the Bone, Tuned to Hear Your feedback, wish you all the Best Bro .. Regards .. Zizou

As a pro, I wouldn't consider this best practice because the comments are just noise, distracting from the really basic code. I'd facepalm if I saw this in production.

The return value for JS was not specified in the description. Apart from that, if one language requires to return None/nil, most often its equivalent is required in other languages as well.

So what is the issue then?

Not an issue - just read the description again:

If a common name has a hyphen/dash, it should be considered a space.

Oh, and you can always print (console.log) the input...

"Dark-Eyed Junco"        -> "DEJU" and not "DAJU"
"Red-Bellied Woodpecker" -> "RBWO" and not "REWO"

Well, that means you need a better algorithm ;-)

Yes, and a certain number in your program is too small ;-)

I don't think it works in JS console at all either. It always returns Pa! Aa!, Pa! or empty string.