Golang or Go is an open source programming language. It was developed by Google in 2007 and officially released to the public in 2009. It is a system programming language with static typing, compilation, strong concurrency, and garbage collection mechanism. It is designed to improve the productivity of programmers. It has become a popular choice in the fields of cloud computing, network programming, operating systems, distributed systems, etc. Mainstream programming languages.
# Operating system for this tutorial: Windows 10 system, Dell G3 computer.
Golang (or Go) is an open source programming language. It was developed by Google in 2007 and officially released to the public in 2009. It is a system programming language with static typing, compilation, strong concurrency, and garbage collection mechanism, aiming to improve programmer productivity.
The design goals of the Go language are: simple, fast, and safe. Its syntax is similar to the C language, but some complex features such as inheritance, method overloading, generics, etc. are removed, making the code more concise and easier to understand. At the same time, the Go language has built-in concurrency primitives, making it easy to write highly concurrent programs. Go language also has an automatic garbage collection mechanism and a powerful standard library, which can greatly improve development efficiency.
Currently, Go language has become a mainstream programming language in cloud computing, network programming, operating systems, distributed systems and other fields. It is also widely used in large-scale engineering and open source projects, such as Kubernetes, Docker, Prometheus, etc.
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go语言有缩进。在go语言中,缩进直接使用gofmt工具格式化即可(gofmt使用tab进行缩进);gofmt工具会以标准样式的缩进和垂直对齐方式对源代码进行格式化,甚至必要情况下注释也会重新格式化。

go语言叫go的原因:想表达这门语言的运行速度、开发速度、学习速度(develop)都像gopher一样快。gopher是一种生活在加拿大的小动物,go的吉祥物就是这个小动物,它的中文名叫做囊地鼠,它们最大的特点就是挖洞速度特别快,当然可能不止是挖洞啦。

是,TiDB采用go语言编写。TiDB是一个分布式NewSQL数据库;它支持水平弹性扩展、ACID事务、标准SQL、MySQL语法和MySQL协议,具有数据强一致的高可用特性。TiDB架构中的PD储存了集群的元信息,如key在哪个TiKV节点;PD还负责集群的负载均衡以及数据分片等。PD通过内嵌etcd来支持数据分布和容错;PD采用go语言编写。

go语言能编译。Go语言是编译型的静态语言,是一门需要编译才能运行的编程语言。对Go语言程序进行编译的命令有两种:1、“go build”命令,可以将Go语言程序代码编译成二进制的可执行文件,但该二进制文件需要手动运行;2、“go run”命令,会在编译后直接运行Go语言程序,编译过程中会产生一个临时文件,但不会生成可执行文件。

go语言需要编译。Go语言是编译型的静态语言,是一门需要编译才能运行的编程语言,也就说Go语言程序在运行之前需要通过编译器生成二进制机器码(二进制的可执行文件),随后二进制文件才能在目标机器上运行。

删除map元素的两种方法:1、使用delete()函数从map中删除指定键值对,语法“delete(map, 键名)”;2、重新创建一个新的map对象,可以清空map中的所有元素,语法“var mapname map[keytype]valuetype”。


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