I am creating String by using String(char) but getting optional value with that, how to remove it?

Question

my output is coming like "Optional(\"A\") but I want only string "A". I have to apply filter on my array by using this character.

let char  = selectedSection.characters.last
let str = String(char)
let array = result?.objectForKey("GetClassPeriodList") as! NSArray
let filtered = array.filter {
    return ($0["Section_Code"] as! String) == str
}
print(filtered)

Answer 1

As @martin-r says, last gives you an optional because you can not be certain that when you ask for the last character of a collection, you actually end out with a character, what if the collection was empty for instance?

What you can do is unwrap it using if let, so you could write:

if let char  = selectedSection.characters.last {
    let str = String(char)
    let array = result?.objectForKey("GetClassPeriodList") as! NSArray
    let filtered = array.filter {
        return ($0["Section_Code"] as! String) == str
    }
    print(filtered)
}

And then you know for certain that your char contains a value which you can continue to work with.

You can read more about optionals here

Hope that helps you.