// Chapter 28 example: sorting a slice of structs with a named function.
// Run with: go run exercises/28/04-sort.go

package main

import (
	"fmt"
	"slices"
	"strings"
)

type critter struct {
	name   string
	energy int
}

func byEnergy(a critter, b critter) int {
	return a.energy - b.energy
}

func byName(a critter, b critter) int {
	return strings.Compare(a.name, b.name)
}

func main() {
	critters := []critter{
		{name: "Spark", energy: 3},
		{name: "Bolt", energy: 2},
		{name: "Nova", energy: 1},
	}

	slices.SortFunc(critters, byEnergy)
	fmt.Println(critters) // [{Nova 1} {Bolt 2} {Spark 3}]

	slices.SortFunc(critters, byName)
	fmt.Println(critters) // [{Bolt 2} {Nova 1} {Spark 3}]
}