Question

I’ve never done any ActionScript before, but what does the line marked below do?

var s:Object = {};

for (var i:int = 0; i < 1000; i++)
{
    s[i] ? s[i]++ : s[i] = -1; //this line
}

It looks similar to a C# shorthand If...Else but I don’t understand what the condition is in this case.

Answer 1

It is ternary operator aka conditional operator.

if(s[i]){
    s[i]++
}else{
    s[i] = -1;
}