жест

loser

ugly, but cool at the same time

loser

loser

Ah JS. "Never let them guess your next move." Thx for pointing this out.

It's polyfill and that's how standard .indexOf works, ex. 'asd'.indexOf('', 10) == 3 so makes sense.

Does it make sense when you search for empty string with a startIndex greater than the string length to say you 'found' it at string length? I would consider it to return -1 in this case because you cannot find anything out of bounds, not even nothing.

damn it, I read "shouldn't"... XD
my mistake, sorry

I provided even more detailed description, can you check it please

Check out how native js String.prototype.indexOf method works, it can convert an array to string, from [-1, -2, -3] to -1,-2,-3 or number to string before trying to find an index.

Actually the same thing for booleans, what will happen with true + "", right 'true'

Hi,

searchValue can be a string, number, array, boolean or some method. It should be converted to string

What does that mean? What the function is supposed to return when it's not a string? => missing specification

Cheers

Good enough, but I think it's odd we could search for an empty needle in a non-empty haystack.

I provided a detailed description to the edge cases

yes, it should've been stated before that startIndex with negative value should be searched normally from the first index, where the JS indexOf would have been treat it to search from the offset of the last index.