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-- Hello.Play --
package main
import (
"fmt"
)
func main() {
fmt.Println("Hello, world!")
}
-- Hello.Output --
Hello, world!
-- Import.Play --
package main
import (
"fmt"
"log"
"os/exec"
)
func main() {
out, err := exec.Command("date").Output()
if err != nil {
log.Fatal(err)
}
fmt.Printf("The date is %s\n", out)
}
-- KeyValue.Play --
package main
import (
"fmt"
)
func main() {
v := struct {
a string
b int
}{
a: "A",
b: 1,
}
fmt.Print(v)
}
-- KeyValue.Output --
a: "A", b: 1
-- KeyValueImport.Play --
package main
import (
"flag"
"fmt"
)
func main() {
f := flag.Flag{
Name: "play",
}
fmt.Print(f)
}
-- KeyValueImport.Output --
Name: "play"
-- KeyValueTopDecl.Play --
package main
import (
"fmt"
)
var keyValueTopDecl = struct {
a string
b int
}{
a: "B",
b: 2,
}
func main() {
fmt.Print(keyValueTopDecl)
}
-- KeyValueTopDecl.Output --
a: "B", b: 2
-- Sort.Play --
package main
import (
"fmt"
"sort"
)
// Person represents a person by name and age.
type Person struct {
Name string
Age int
}
// String returns a string representation of the Person.
func (p Person) String() string {
return fmt.Sprintf("%s: %d", p.Name, p.Age)
}
// ByAge implements sort.Interface for []Person based on
// the Age field.
type ByAge []Person
// Len returns the number of elements in ByAge.
func (a ByAge) Len() int { return len(a) }
// Swap swaps the elements in ByAge.
func (a ByAge) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a ByAge) Less(i, j int) bool { return a[i].Age < a[j].Age }
// people is the array of Person
var people = []Person{
{"Bob", 31},
{"John", 42},
{"Michael", 17},
{"Jenny", 26},
}
func main() {
fmt.Println(people)
sort.Sort(ByAge(people))
fmt.Println(people)
}
-- Sort.Output --
[Bob: 31 John: 42 Michael: 17 Jenny: 26]
[Michael: 17 Jenny: 26 Bob: 31 John: 42]
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