Find duplicates in a struct array on multiple fields

package main

import (
    "fmt"
)

// Define your struct
type Person struct {
    Name string
    Age  int
    City string
}

func main() {
    // Create an array of structs
    people := []Person{
        {"John", 25, "New York"},
        {"Jane", 30, "London"},
        {"John", 30, "New York"},
        {"Bob", 22, "Paris"},
        {"Jane", 30, "London"},
    }

    // Create a map to store the encountered values
    seen := make(map[struct{ Name, City string }]bool)

    // Iterate through the array
    for _, person := range people {
        // Check if the combination of Name and City has been seen before
        key := struct{ Name, City string }{person.Name, person.City}
        if seen[key] {
            fmt.Printf("Duplicate found: %+v\n", person)
        } else {
            // Mark the current combination as seen
            seen[key] = true
        }
    }
}