What's the main difference between the Array , Set and Dictionary collection
type?

In Swift, Arrays, Sets, and Dictionaries are the primary collection types, each serving distinct purposes and having unique characteristics. Here’s a detailed comparison of these three collection types:

Arrays

• Ordered Collection: Arrays store elements in a specific order, and each element can be accessed by its index.
• Duplicates Allowed: Arrays can contain multiple instances of the same value.
• Index-Based Access: Elements in an array can be accessed using their index.
• Initialization: Arrays are initialized using square brackets, e.g., var arrayExample: [Int] = [1][2][3][4][5][1][3][4].

Example:

var arrayExample: [Int] = [1, 2, 3, 4, 5]
arrayExample.append(6) // Adds 6 to the end of the array
arrayExample.remove(at: 0) // Removes the first element

Sets

• Unordered Collection: Sets store elements without any specific order.
• Unique Elements: Sets do not allow duplicate elements; each element must be unique.
• No Index-Based Access: Elements in a set cannot be accessed by an index.
• Initialization: Sets are initialized using square brackets with the Set type, e.g., var setExample: Set<Int> = [1][2][3][4][5][1][3][4].

Example:

var setExample: Set<Int> = [1, 2, 3, 4, 5]
setExample.insert(6) // Adds 6 to the set
setExample.remove(1) // Removes 1 from the set

Dictionaries

• Key-Value Pairs: Dictionaries store associations between unique keys and values.
• Unordered Collection: The order of key-value pairs is not maintained.
• Unique Keys: Each key in a dictionary must be unique, but values can be duplicated.
• Initialization: Dictionaries are initialized using square brackets with key-value pairs, e.g., var dictionaryExample: [String: Int] = ["one": 1, "two": 2, "three": 3][1][4][6].

Example:

var dictionaryExample: [String: Int] = ["one": 1, "two": 2, "three": 3]
dictionaryExample["four"] = 4 // Adds a new key-value pair
dictionaryExample["one"] = nil // Removes the key-value pair with key "one"

Performance Considerations

• Arrays: Best used whe...