Swift Language Essentials
Protocols, extensions, generics, property wrappers, type casting, advanced enums
1What is an Array in Swift?
What is an Array in Swift?
回答
Array is an ordered collection storing elements of the same type and allowing duplicates. Elements are accessible by index starting from 0. Array maintains insertion order and suits scenarios where element order matters.
2What characterizes a Set in Swift?
What characterizes a Set in Swift?
回答
Set is an unordered collection of unique elements. Each element appears only once. Set is optimal for fast membership testing and guaranteeing uniqueness. Unlike Array, insertion order is not preserved.
3What is a Dictionary in Swift?
What is a Dictionary in Swift?
回答
Dictionary is an unordered collection of key-value pairs. Each key is unique and enables quick access to its associated value. Dictionary suits storing related data identified by a key, like a phone directory where the name is the key. Key-based access is constant time O(1).
What is a stored property in Swift?
What is a computed property in Swift?
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