What is retain in swift?
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What is string in swift?
How do you make a swift bridging header?
What are the different floating point numbers in swift?
Is swift memory safe?
How can you write a multiple line comment swift?
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?
What lazy stored properties is and when it is useful?
Can you make a property optional?
What is init() in swift?
What is optional binding?
What are the differences between a struct and a class?
How many types of closures are there in swift?