Golang : Sort and reverse sort a slice of runes
Problem :
How to sort and reverse sort a slice of runes ?
Solution :
Sorting runes depends on the integer value of the rune and it will be ordered according to the integer values . Here's an example of how to sort slice of runes :
package main
import (
"fmt"
"sort"
)
type RuneSlice []rune
func (p RuneSlice) Len() int { return len(p) }
func (p RuneSlice) Less(i, j int) bool { return p[i] < p[j] }
func (p RuneSlice) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
var runes RuneSlice = []rune{'可', '愛'} // sort based on the integer values of the runes
func main() {
// Runes
fmt.Println("Original : ", runes[:])
fmt.Println("Original : ", string(runes[:]))
sort.Sort(RuneSlice(runes))
fmt.Println("Sort : ", runes[:])
fmt.Println("Sort : ", string(runes[:]))
sort.Sort(sort.Reverse(runes[:]))
fmt.Println("Reverse : ", runes[:])
fmt.Println("Reverse : ", string(runes[:]))
}
Output :
Original : [21487 24859]
Original : 可愛
Sort : [21487 24859]
Sort : 可愛
Reverse : [24859 21487]
Reverse : 愛可
UPDATE : You can import "github.com/cznic/sortutil" and use the RuneSlice.Sort() method ( see http://godoc.org/github.com/cznic/sortutil#RuneSlice ) as well if you prefer.
See also : Golang : Sort and reverse sort a slice of bytes
By Adam Ng
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