How to Sort a Slice in Go

In Golang, using the sort.Slice function is the easiest way to sort a slice
Created
Modified

Using Slice Function

You simply pass an anonymous function to the sort.Slice function：

package main

import (
  "fmt"
  "sort"
)

func main() {
  s := []string{"Houston", "Atlanta", "Boston"}
  sort.Slice(s, func(i, j int) bool {
    return s[i] < s[j]
  })
  fmt.Println(s)

  a := []int{6, 4, 2}
  sort.Slice(a, func(i, j int) bool {
    return a[i] < a[j]
  })
  fmt.Println(a)
}
[Atlanta Boston Houston]
[2 4 6]

Slice sorts the slice x given the provided less function. It panics if x is not a slice.

See the following example:

package main

import (
  "fmt"
  "sort"
)

func main() {
  people := []struct {
    Name string
    Age  int
  }{
    {"Gopher", 7},
    {"Alice", 55},
    {"Vera", 24},
    {"Bob", 75},
  }
  sort.Slice(people, func(i, j int) bool { return people[i].Name < people[j].Name })
  fmt.Println("By name:", people)

  sort.Slice(people, func(i, j int) bool { return people[i].Age < people[j].Age })
  fmt.Println("By age:", people)
}
By name: [{Alice 55} {Bob 75} {Gopher 7} {Vera 24}]
By age: [{Gopher 7} {Vera 24} {Alice 55} {Bob 75}]

Related Tags

#sort# #slice#

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