Sort a Go struct based on a string value.

sort_struct.go

package main

import (
	"fmt"
	"sort"
)

// Our custom struct to sort.
type Data struct {
	Name string
	Desc string
}

// Shortcut type.
type DataSlice []*Data

// Len, Swap and Less is part of the sort interface we must supply.
func (d DataSlice) Len() int {
	return len(d)
}

func (d DataSlice) Swap(i, j int) {
	d[i], d[j] = d[j], d[i]
}

func (d DataSlice) Less(i, j int) bool {
	return d[i].Name < d[j].Name
}

// Some shortcut func for printing a slice.
func print_slice(d DataSlice) {
	for i, v := range d {
		fmt.Println(i, v)
	}
}

func main() {
	d := DataSlice{
		&Data{"bbb", "desc of b"},
		&Data{"ccc", "desc of c"},
		&Data{"aaa", "desc of a"},
	}
	fmt.Println("Before sort:")
	print_slice(d)

	sort.Sort(d)

	fmt.Println("\nAfter sort:")
	print_slice(d)
}