packagech01// author:郜宇博typeCmdstruct{// 标注是否为 --helphelpFlagbool//标注是否为 --versionversionFlagbool//选项cpOptionstring//主类名,或者是jar文件classstring//参数args []string} Go语言标准库包 由于要处理的命令行,因此将使用到flag()函数,此函数为Go的标准库包之一。 Go语言的标准库以包的...
package main import "fmt" func main() { var a = [...]string{"bj", "sh", "gz", "sz"} for index, value := range a { # 这里range是go自己实现的一个方法,它的输出是两个值,一个是索引一个是值 fmt.Printf("index:%d,value:%s\n", index, value) # 用两个参数来接收数据 } } #...
// Config for BigCachetypeConfigstruct{// Number of cache shards, value must be a power of twoShardsint// Time after which entry can be evictedLifeWindow time.Duration// Interval between removing expired entries (clean up).// If set to <= 0 then no action is performed. Setting to < 1...
This typically happens when you're trying to assign to a package-level variable that has a type that can't be constant (like for example,Regexp). Only basic types likesint,string, etc. can be constant. Seeherefor more details. 当您尝试分配具有不能为常量的类型的包级变量时(例如,Regexp)...
1// 将 decode 的值转为 int 使用2funcmain(){3vardata=[]byte(`{"status": 200}`)4varresult map[string]interface{}56iferr:=json.Unmarshal(data,&result);err!=nil{7log.Fatalln(err)8}910varstatus=uint64(result["status"].(float64))11fmt.Println("Status value: ",status)12}...
type SliceInt[]inttype SliceFloat[]float64type SliceInt[]string 是不是节省了大量的代码量。 (二)泛型map变量 同理,我们可以试着定义其他类型的泛型变量,定义Map1[KEY, VALUE]泛型变量,它是一个map类型的,其中类型参数KEY的类型约束是int|string,类型参数VALUE的类型约束为string|float64。它的类型参数列表有...
// Min return the min onefunc Min[E int | int8 | int16 | int32 | int64 | uint | uint8 | uint16 | uint32 | uint64 | float32 | float64 | uintptr | ~string](x, y E) E {if x < y {return x}return y} 1.2类型集合 Type Set ...
近期对nmap的操作系统识别功能造了个轮子,用golang实现了一遍,想未来能用于扫描器,资产发现/管理系统,网络空间引擎中。 造轮子也是一次深入理解它原理的过程,造完轮子后感觉到所有代码尽在我掌握之中,之后大规模扫描测试就可以 以最有效率,发最小包,绕过防火墙的方式进行集成,也能轻易的进行扩展。
type Signed interface { ~int | ~int8 | ~int16 | ~int32 | ~int64 } // Unsigned is a constraint that permits any unsigned integer type. // If future releases of Go add new predeclared unsigned integer types, // this constraint will be modified to include them. ...
const constant_name type = constant_value const constant_name = constant_value Note:We can also omit the type during the constant declaration, the compiler assigns the type of the value to the constant. Example of constant packagemainimport("fmt")constDEFAULT_NAMEstring="Not available"constDEFAUL...