What would be the best way to deal with the `-1` c...

# announcements

[frellan]

What would be the best way to deal with the -1 crap that indexOf throws if it does not find something in a string. I find this ugly and unidiomatic for kotlin

var doubleslash = url.indexOf("//")
if (doubleslash == -1) doubleslash = 0 else doubleslash += 2

Would like it to be similar to (I know this dont work):

val doubleslash = (url.indexOf("//") + 2) ?: 0