package mainimport ( "flag" "fmt")func main() { debug := flag.Bool("verbose", false, "Verbose log output.") name := flag.String("name", "", "your Name") flag.Parse() fmt.Println(*debug) fmt.Pri
example_flag.go 代码下载: example_flag.go package main import ( "flag" "fmt" ) var inputName = flag.String("name", "CHENJIAN", "Input Your Name.") var inputAge = flag.Int("age", 27, "Input Your Age") var inputGender = flag.String("gender", "female", "Input Your Gender") ...
func NFlag 获取解析的参数数量 func (f *FlagSet) NFlag() int fmt.Printf("args nubmer: %d", f.NFlag()) // shell // go run main.go -p 8080 // args number: 1 func Lookup 获取指定命令参数信息 func (f *FlagSet) Lookup(name string) *Flag func NArg 获取解析后剩余参数的数量 func ...
//ip 的类型是: *int flag.Parse() fmt.Println("Hello,", *username) } 编译执行的结果如下: davin-mac-wifi:goexample davin$ go build main.go davin-mac-wifi:goexample davin$ ./main-name=world //这就是参数name的名称 Hello, world davin-mac-wifi:goexample davin$ ./main Hello, davin-ma...
Package flag implements command-line flag parsing. flag 库[1] 能够支持基础的命令行 flag 解析。使用起来并不复杂, 我们可以针对 string, integer, bool 三种类型来定义 flag,如:flag.String(), Bool(), Int()。 比如下面这样,我们就定义了一个 -n 的选项,默认值为 1234, 提示信息为 help message for...
packagespackagelists and patternsprivateconfigurationfordownloading non-publiccode testflag testing flags testfunc testing functions vcs controlling version controlwithGOVCSUse"go help <topic>"formore information about that topic. 其中和编译相关的有build、get、install、run这4个。接下来就依次看看这四个的作...
不熟悉的同学建议多看看看 go by example[2] 的示例,讲的很清楚。 从开发者的角度看,其实我们只要定义好变量,用 flag.XXVar 来绑定,最后 flag.Parse 就可以用: packagemainimport("fmt""flag")var( intflagintboolflagboolstringflagstring)funcinit(){ ...
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不熟悉的同学建议多看看看go by example[2]的示例,讲的很清楚。 从开发者的角度看,其实我们只要定义好变量,用 flag.XXVar 来绑定,最后 flag.Parse 就可以用: package main import ( "fmt" "flag" ) var ( intflag int boolflag bool stringflag string ...
package test import ( "bytes" "strings" "testing" ) func BenchmarkByte(t *testing.B) { b := bytes.Buffer{} b.WriteString("foo") for i := 0; i < t.N; i++ { b.String() } } func BenchmarkStr(t *testing.B) { s := strings.Builder{} s.WriteString("test") for i :=...