今天的这个异常 reflect.Set: value of type *xxx is not assignable to type xxx 他的底层原因和我们的上一篇文章密切相关,核心就是对.Elem()方法的理解和应用。 异常代码示例 要使用反射赋值的对象 res 已经是一个指针了,没有加 & 在使用反射赋值(v.Elem().Set(reflect.ValueOf(
AI代码解释 // runtime/signal_unix.gofuncsetThreadCPUProfiler(hz int32){mp:=getg().m// 获取当前协程绑定的的线程M...spec:=new(itimerspec)spec.it_value.setNsec(1+int64(fastrandn(uint32(1e9/hz)))spec.it_interval.setNsec(1e9/int64(hz))// 设置间隔为 100000000/100 纳秒 = 10msvartim...
//申明type Map1[KEY int | string, VALUE string | float64] map[KEY]VALUE//实例化:KEY和VALUE要替换成具体的类型。map里面的也要保持一致var MyMap1 Map1[int, string] = map[int]string{ 1: "hello", 2: "small",}//或者这简写MyMap2 := Map1[int, string]{ 1: "hello", 2: "small"...
/tmp/sandbox627475386/main.go:4: imported and not used:"fmt"/tmp/sandbox627475386/main.go:5: imported and not used:"log"/tmp/sandbox627475386/main.go:6: imported and not used:"time" Works: package mainimport(_"fmt""log""time")var_=log.Printlnfuncmain() {_=time.Now} 另一个选择是...
__tostring=function(self)returnstring.pack(">BBI2",self.version,//一般是3self.reservedor0,//一般是0(self.dataand#self.data+4or4))//整个结构体的大小,包括后面的数据..self.data//后面的数据 x224Crq(7 字节):一个 X.224 类 0 连接请求传输协议数据单元 (TPDU),如[X224]第 13.3 节中所指...
return errors.Is(err, ErrLockAcquiredByOthers) } // 基于 redis 实现的分布式锁,不可重入,但保证了对称性 type RedisLock struct { LockOptions key string token string client *Client } func NewRedisLock(key string, client *Client, opts ...LockOption) *RedisLock { ...
11. string 类型的变量值不能为 nil 对那些喜欢用nil初始化字符串的人来说,这就是坑: // 错误示例funcmain(){varsstring=nil// cannot use nil as type string in assignmentifs ==nil{// invalid operation: s == nil (mismatched types string and nil)s ="default"} ...
type Server typeServerstruct{ Addrstring// TCP address to listen on, ":http" if empty HandlerHandler// handler to invoke, http.DefaultServeMux if nil TLSConfig*tls.Config// optional TLS config, used by ListenAndServeTLS // ReadTimeout is the maximum duration for reading the entire ...
Ifsql.NullStringofValidattribute is false, SQL builder will ignore this zero value gosql.Expr Reference GORM Expr, Resolve update field self-update problem gosql.Table("users").Update(map[string]interface{}{"id":2,"count":gosql.Expr("count+?",1) })//Builder SQL//UPDATE `users` SET ...
/* Parses a single fingerprint from the memory region given. If anon-null fingerprint is returned, the user is in charge of freeing itwhen done. This function does not require the fingerprint to be 100%complete since it is used by scripts such as scripts/fingerwatch forwhich some partial ...