/* Go quine */
package main
import "fmt"
func main() {
fmt.Printf("%s%c%s%c\n", q, 0x60, q, 0x60)
}
var q = `/* Go quine */
package main
import "fmt"
func main() {
fmt.Printf("%s%c%s%c\n", q, 0x60, q, 0x60)
}
var q = `
func main() {
for i := range random(100) {
fmt.Println(i)
}
}
func random(n int) <-chan int {
c := make(chan int)
go func() {
defer close(c)
for i := 0; i < n; i++ {
select {
case c <- 0:
case c <- 1:
}
}
}()
return c
}
基于select语言特性构造的随机数生成器。
Assert测试断言
type testing_TBHelper interface {
Helper()
}
func Assert(tb testing.TB, condition bool, args ...interface{}) {
if x, ok := tb.(testing_TBHelper); ok {
x.Helper() // Go1.9+
}
if !condition {
if msg := fmt.Sprint(args...); msg != "" {
tb.Fatalf("Assert failed, %s", msg)
} else {
tb.Fatalf("Assert failed")
}
}
}
func Assertf(tb testing.TB, condition bool, format string, a ...interface{}) {
if x, ok := tb.(testing_TBHelper); ok {
x.Helper() // Go1.9+
}
if !condition {
if msg := fmt.Sprintf(format, a...); msg != "" {
tb.Fatalf("Assertf failed, %s", msg)
} else {
tb.Fatalf("Assertf failed")
}
}
}
func AssertFunc(tb testing.TB, fn func() error) {
if x, ok := tb.(testing_TBHelper); ok {
x.Helper() // Go1.9+
}
if err := fn(); err != nil {
tb.Fatalf("AssertFunc failed, %v", err)
}
}