What are structures in swift?
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What is forced unwrapping?
Explain grand central dispatch (gdc).
Mention what is the Floating point numbers and what are the types of floating number in Swift?
What is swift? How is it different from objective-c?
What is data type in swift?
What is the use of double question mark “??” In swift?
What are swift categories?
What is hashable in swift?
Consider the following code: var defaults = NSUserDefaults.standardUserDefaults() var userPref = defaults.stringForKey("userPref")! printString(userPref) func printString(string: String) { println(string) } Where is the bug? What does this bug cause? What’s the proper way to fix it?
What type of objects are basic data types in swift?
Explain completion handler?
What is difference between xcode and swift?