Complete Guide to the sort Package in Go

The sort package provides functions to sort slices of basic types and interfaces for custom data. Use sort.Slice with a custom comparison function to sort complex types.

package main

import (
	"fmt"
	"sort"
)

type Person struct {
	Name string
	Age  int
}

func main() {
	people := []Person{{"Alice", 30}, {"Bob", 25}, {"Charlie", 35}}
	sort.Slice(people, func(i, j int) bool {
		return people[i].Age < people[j].Age
	})
	fmt.Println(people)
}

The sort package is a built-in tool that arranges lists of data in a specific order, like alphabetizing names or ranking numbers. You use it when you need to organize a collection of items before displaying or processing them. Think of it like a librarian who automatically shelves books from A to Z without you having to move them one by one.