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iOS

Posted by Thomas Katalenas
Thomas Katalenas
11,033 Points

don' t return a nil!!

http://pastebin.com/gZeiFWia

var ok: String? if ok != nil{ print("Found (ok!)") }

so it created a nil variable and then tried to unwrap it with (ok!) and got the pastebin output from iswift.org. lol awseome.

2 Answers

Steven Deutsch
Steven Deutsch
21,046 Points
Steven Deutsch
Steven Deutsch
21,046 Points

Hey Thomas Katalenas,

You can also use optional binding to safely unwrap an optional value. 

var ok: String? 

// If ok has a nil value, the code in the block will never be executed
if let hasValue = ok {
    print("Found \(hasValue)")
}

Good Luck!

Thomas Katalenas
Thomas Katalenas
11,033 Points
Thomas Katalenas
Thomas Katalenas
11,033 Points

how would I use optional chaining for this

if let isValue = ok?.toInt() {
    print(" Found \(hasValue)")
}