The total is technically the sum of all possible multiplications between a start and n. The highest value, which is what he meant, is indeed, x * n where n is the highest possible value of n.

aaaaaaaaaaaaaaaaaaaaaaah, ok thanks a lot

The if (slen < eLen) checks whether the ending string is longer than the str. If it is, it's impossible for str to end with ending, because a shorter string cannot contain a longer suffix. This is a necessary optimization that saves computation time by immediately returning false in such cases.

You are correct in observing that this condition indirectly accounts for empty strings, but its main purpose is to enforce a size constraint for the suffix check.

why the first conditional? even if they are not the same size, first string may end matching the second, is it for the empty strings cases?

I never knew there was an endsWith method! So concise, love it

total will be equal n, not x * n

arguments is a built-in feature in JavaScript that is only available within all non-arrow functions.

why you guyes dont use using namespace std ;

These simple things makes me feel stupid every kata again xD

:O everything is about maintainability! :P

That doesn't matter. Just passing the test matters.

It is indeed a good solution, but it's important to note that it overflows faster, causing us to lose almost 1/3 of the possible values