int_slice.go

package sorter

import "sort"

// Define a custom type and methods to implement sort.Interface
type DescendingInts []int

func (d DescendingInts) Len() int           { return len(d) }
func (d DescendingInts) Swap(i, j int)      { d[i], d[j] = d[j], d[i] }
func (d DescendingInts) Less(i, j int) bool { return d[i] > d[j] }

func IntSliceSortDesc(numbers []int) []int {
	sort.Sort(DescendingInts(numbers))
	return numbers
}