find the smallest key in a map in swift

To find the smallest key in a Swift Map (Dictionary), you can use the min() function to compare keys and return the one with the smallest value. Here's an example:

main.swift
let myMap = ["C": 16, "B": 12, "A": 4, "D": 23]

if let smallestKey = myMap.keys.min() {
    print(smallestKey) // "A"
}
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In this code, we declare a Swift Map myMap with four key-value pairs. We then use an optional binding statement to unwrap the min() function, which returns the smallest key in myMap. We then print the smallest key ("A") to the console.