📜本章目录：0x00操作符（operators）0x01内建类型（Build-in）0x02类型转换：显式类型转换0x03在较长数字中使用下划线0x04字符串（String）0x05字符串模板（StringTemplates）0x06字符串连接（变量插值）0x06 指定变量类型0x07可变var 和不可变val0x00操作符（operators）操作符的概念相信大家并不陌生，基础概念我们就不做讲解了，下面我罗列的是Kotlin的操作符，这和C/C++几乎是是完全一样的。数学运算符：+-*/%增减运算符：++--比较运算符：>=赋值运算符：=比较运算符：==!=我们来列举一些 整型数学运算：1
取自gotour:packagemainimport("fmt""math")typeAbserinterface{Abs()float64}funcmain(){varaAbserf:=MyFloat(-math.Sqrt2)v:=Vertex{3,4}a=fa=&v//v==Vertex!=*Vertex->exceptiona=v}typeMyFloatfloat64func(fMyFloat)Abs()float64{iff但是，当将func(v*Vertex)Abs()float64转换为func(vVertex)Abs()float64时，代码编译:packagemaini
取自gotour:packagemainimport("fmt""math")typeAbserinterface{Abs()float64}funcmain(){varaAbserf:=MyFloat(-math.Sqrt2)v:=Vertex{3,4}a=fa=&v//v==Vertex!=*Vertex->exceptiona=v}typeMyFloatfloat64func(fMyFloat)Abs()float64{iff但是，当将func(v*Vertex)Abs()float64转换为func(vVertex)Abs()float64时，代码编译:packagemaini
packagemainimport"fmt"import"time"import("runtime""sync/atomic")funcinit(){runtime.GOMAXPROCS(runtime.NumCPU())}funcmain(){vart1=time.Now()varopsuint64=0gofunc(){for{time.Sleep(time.Second)opsFinal:=atomic.LoadUint64(&ops)fmt.Println("ops:",opsFinal,"qps:",opsFinal/uint64(time.Since(t1).Seconds(
packagemainimport"fmt"import"time"import("runtime""sync/atomic")funcinit(){runtime.GOMAXPROCS(runtime.NumCPU())}funcmain(){vart1=time.Now()varopsuint64=0gofunc(){for{time.Sleep(time.Second)opsFinal:=atomic.LoadUint64(&ops)fmt.Println("ops:",opsFinal,"qps:",opsFinal/uint64(time.Since(t1).Seconds(
我正在遵循本书(https://github.com/PacktPublishing/Go-Design-Patterns/blob/master/Chapter02/main.go)中描述的单例设计模式，并且我在文件“singleton2.go”中有以下代码:packagesingleton2typeSingletoninterface{AddOne()int}typesingletonstruct{countint}//varinstance=&singleton{}varinstance*singletonfuncGetInstance()*singleton{ifinstanc
我正在遵循本书(https://github.com/PacktPublishing/Go-Design-Patterns/blob/master/Chapter02/main.go)中描述的单例设计模式，并且我在文件“singleton2.go”中有以下代码:packagesingleton2typeSingletoninterface{AddOne()int}typesingletonstruct{countint}//varinstance=&singleton{}varinstance*singletonfuncGetInstance()*singleton{ifinstanc
K8s在创建pod时发现pod状态为ContainerCreating状态检查pod的日志发现提示Failedcreatepodsandbox:rpcerror:code=Unknowndesc=failedtosetupsandboxcontainer"fdd30141bf51b68d4f08a2405ea287508aa0d585d30c853a849d9d57cb7c1062"networkforpod"tiller-deploy-58565b5464-zhnml":NetworkPlugincnifailedtosetuppod"tiller-deploy-58565b5464-zhn
记录：安装ros时出现的依赖错误输入sudoaptinstallros-noetic-desktop-full之后就开始报这个错python3-rosdep-modules:依赖:python3-catkin-pkg-modules(>=0.4.0)但是它将不会被安装而且提示：可以用sudoapt--fix-brokeninstall不指名修复然后报错E:Sub-process/usr/bin/dpkgreturnedanerrorcode(1)/dpkg:errorprocessingarchive/var/cache/apt/archives/python-rospkg-modules_1
ubuntu22.10在安装cuda，使用如下命令：sudoshcuda_11.0.2_450.51.05_linux.run 结果产生错误提示：Failedtoverifygccversion.Seelogat/var/log/cuda-installer.logfordetails.1、这是由于gcc版本不匹配的问题！一般简易解决方法是忽略，使用--override参数sudoshcuda_11.0.2_450.51.05_linux.run--override 2、或者可以变更gcc版本， A、首先在选CUDA版本时，链接尾部可以看到"VersionedOnlineDocumenta
