Go by Example: Sorting

Go’s sort package implements sorting for builtins and user-defined types. We’ll look at sorting for builtins first.

package main
import "fmt"
import "sort"
func main() {

Sort methods are specific to the builtin type; here’s an example for strings. Note that sorting is in-place, so it changes the given slice and doesn’t return a new one.

    strs := []string{"c", "a", "b"}
    fmt.Println("Strings:", strs)

An example of sorting ints.

    ints := []int{7, 2, 4}
    fmt.Println("Ints:   ", ints)

We can also use sort to check if a slice is already in sorted order.

    s := sort.IntsAreSorted(ints)
    fmt.Println("Sorted: ", s)

Running our program prints the sorted string and int slices and true as the result of our AreSorted test.

$ go run sorting.go
Strings: [a b c]
Ints:    [2 4 7]
Sorted:  true

Next example: Sorting by Functions.