What is nil-coalescing operator?


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More Apple iOS Swift Interview Questions

Consider the following code: var array1 = [1, 2, 3, 4, 5] var array2 = array1 array2.append(6) var len = array1.count What’s the value of the len variable, and why?

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What is the full form of swift code?

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What is category in swift?

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What is nsdictionary in swift?

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What is closure in swift?

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Mention what are the type of integers does Swift have?

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What is a protocol in swift?

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Explain the adapter and memento pattern?

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What is a guard statement? What is the benefit of using guard statement in swift?

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What is lazy var in swift?

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The String struct doesn’t provide a count or length property or method to count the number of characters it contains. Instead a global countElements<T>() function is available. When applied to strings, what’s the complexity of the countElements function: O(1) O(n) and why?

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Is swift a language or framework?

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