define a collection struct in swift

In Swift, you can define a collection struct using the struct keyword along with an array or dictionary data type. Here's an example:

main.swift
struct MyCollection {
    var myArray: [String]
    var myDictionary: [Int: String]
}
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In this example, we define a struct called MyCollection with two properties: myArray of type [String] and myDictionary of type [Int: String]. These properties hold an array and dictionary respectively.

You can then create an instance of MyCollection and populate its properties:

main.swift
var collection = MyCollection(myArray: ["apple", "orange", "banana"], myDictionary: [1: "dog", 2: "cat", 3: "fish"])
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In this example, we create an instance of MyCollection named collection and initialize its properties with some sample data.

You can then access and modify the properties of collection like you would with any other struct:

main.swift
print(collection.myArray) // prints ["apple", "orange", "banana"]
print(collection.myDictionary[1]) // prints "dog"

collection.myArray.append("grape")
collection.myDictionary[4] = "bird"

print(collection.myArray) // prints ["apple", "orange", "banana", "grape"]
print(collection.myDictionary) // prints [1: "dog", 2: "cat", 3: "fish", 4: "bird"]
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