How does it work? why you can just swap base and power and it still works?

You've wrote a great elegant solution but it's very unclear. I spend half a day to understand what your code actually does. It is the case where comments are absolutely necessary

why square root?

checking for empty string.

empty string is boolean False so when s exists (== True) Python returns this expression:

s[0] + s.title().translate(None, "-_")[1:]

otherwise it returns s which is ""

stupid technical requirement

explain this please (a=>a(1)[0]**2*a(2)[0])

why this doesn't work :
while ( ( xsSymbol.iterator.next() ) && !found ) {......}

why have we to use variable iterator to store xs[Symbol.iterator]() ?