What is forced unwrapping?
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Is equal to string swift?
Is swift an object-oriented programming language?
Should I use struct or class swift?
What is difference between class and struct swift?
What is the meaning of question mark "?" In swift?
What is unowned in swift?
What is difference between single and double, in swift?
Is swift object oriented programming?
What is enum in swift?
How can you make a property optional in swift?
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?
Why swift is safe?