Junior — Middle
Can you name the main types of collections used in Swift?
sobes.tech AI
Answer from AI
In the Swift language, the main collection types include:
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Array — an ordered list of elements of the same type. Allows storing elements with index access.
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Set — an unordered collection of unique elements. Fast search and presence check.
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Dictionary — a collection of key-value pairs, where keys are unique. Allows quick retrieval of values by key.
Example usage:
var numbers: [Int] = [1, 2, 3]
var uniqueNames: Set<String> = ["Anna", "Bob", "Anna"] // contains "Anna" and "Bob"
var ages: [String: Int] = ["Alice": 30, "Bob": 25]