How to sort struct with multiple sort parameters?

Question

I have an array/slice of members:

type Member struct {
    Id int
    LastName string
    FirstName string
}

var members []Member

My quest

Answer 1

Here is a slightly more concise implementation of the accepted answer:

package main

import (
    "fmt"
    "sort"
)

type Member struct {
    FirstName string
    LastName  string
}

func main() {
    members := []Member{
        {"John", "Doe"},
        {"Jane", "Doe"},
        {"Mary", "Contrary"},
    }

    fmt.Println(members)

    sort.Slice(members, func(i, j int) bool {
        return members[i].LastName < members[j].LastName || members[i].FirstName < members[j].FirstName
    })

    fmt.Println(members)
}

Running will print the following output:

[{John Doe} {Jane Doe} {Mary Contrary}]
[{Mary Contrary} {Jane Doe} {John Doe}]

This is as expected: the members are printed in order of ascending last name, where in the case of a tie, they are printed in order of first name.