Go语言的程序元素 Go语言包含了五种程序符号，分别是标识符（identifier）、关键字(keyword)、运算符(operator)、分隔符(delimiter)与字面量(literal)。这五种程序元素组合成各种表达式和语句。 标识符标识符是用于标识变量、函数或任何用户自定义项目的名称（程序实体） 标识符可分为两类，一类是用户定义的标识符，作为程序实体存在；另一类是预定义标识符，它们在Go语言中的源代码被声明（如数据类型）。还有一个特殊的标识符，叫空标识符，记作 "_"，一般用在变量声明与包的导入中。例如，在Go语言程序中，若存在一个没有使用的变量a，那么编译时就会报错，因为Go语言要求存在的程序实体必须被使用，这时就可以使用这样一句 _=a 的代码，编译器就会认为已经使用了变量a（...阅读全文
<p>Hello. I am c# developer, but I started to learn go. I wrote a small program in go that is http mock server. I would like to receive some pointers on implementation, code style and go naming guidelines. </p> <p>Application is designed to provide responses based on url, headers and query params. I tried to make configuratio...阅读全文
<p>Hi, <a href="/r/golang" rel="nofollow">r/golang</a>.I am reading an introductory golang book and I am stuck on a small detail.Basically the program is called 'dup' and it is supposed to look for adjacent duplicate lines from an input source(in this case os.Stdin).It is supposed to be inspired by ...阅读全文
<p>For the small number of golang users who interact with Apple's push notification server -> this is a pkg for you!</p> <p><a href="https://github.com/sbsends/ajwt" rel="nofollow">GitHub Repo</a> </p> <hr/>**评论：**<br/><br/>stackmutt: <pre><p>We...阅读全文
在网络应用开发中，开发者首先要做的一个决定是使用 TCP 还是 UDP 作为传输层协议。TCP 是基于连接，并且基于字节流提供可靠的数据传输的协议。而 UDP 是无连接，通过数据包发送数据，并不保证送达的协议。 我们将在这一节分别利用 UDP 和 TCP 实现一套 client-server 程序。 该程序主要完成的功能是： client 从键盘读取一行字符串，并发给 server server 收到字符串并转换成大写 server 将修改后的字符串发送给 client client 收到修改后的数据并显示 2.7.1 Socket Programming with UDP UDP 在发送数据包时，需要先在数据包中附加地址的信息。网络会利用这个信息 route 数据包到达接收程序。 附加的地...阅读全文
<p>So I know I can create a struct and have it contain the array and then return an array of the objects, but is there a way I can just do it in the method definition. I'll probably create one anyway, because I need a place to store my arrays before I return them, but was wondering if there was an easier way?</p> <p>so in...阅读全文
<p>I'm trying to split an application into specific server processes behind a message broker. ATM, I'm working on the register server that will run an http RPC in golang. my question is from the example code I see here <a href="https://golang.org/pkg/net/rpc/" rel="nofollow">link</a>. Assuming I&...阅读全文
介绍 Python 炫酷功能(例如，变量解包，偏函数，枚举可迭代对象等)的文章层出不穷。但是还有很多 Python 的编程小技巧鲜被提及。因此，本文会试着介绍一些其它文章没有提到的小技巧，这些小技巧也是我平时会用到的的。让我们一探究竟吧! 整理字符串输入 整理用户输入的问题在编程过程中极为常见。通常情况下，将字符转换为小写或大写就够了，有时你可以使用正则表达式模块「Regex」完成这项工作。但是如果问题很复杂，可能有更好的方法来解决： 1. user_input = "This\nstring has\tsome whitespaces...\r\n" 3. character_map = { 4. ord('\n') : ' ', 5. ord('\t') : ' ', 6. ord('\...阅读全文
一、背景本文整理自Johannes Nicolai在JFrog 2019用户大会上的讲演《DevOps for Non-Hipsters（aka C/C++ programmers）》。Johannes Nicolai是Github的解决方案架构师，主要负责德语区的用户。他和很多制造业的用户（多数使用C/C++）交流，询问他们在DevOps或持续交付方面的挑战，通常会得到如下的描述：在嵌入式C/C++领域，花费几十个小时完成一个完整的DevOps流水线并不少见。为某一个提交运行单独的构建和测试几乎是不可能的，通常每次构建都包含了几百个同事所有的提交。而构建时间长的主要原因在于交付包包含了大量的依赖包，而每次构建这些依赖包都需要从头开始重新构建。上述的描述并不仅限于德语区，Johannes...阅读全文
<p><a href="https://github.com/Laughs-In-Flowers/countfloyd" rel="nofollow">https://github.com/Laughs-In-Flowers/countfloyd</a></p> <p>countfloyd is sort of an odd duck project that I've been to hell and back with, abstracted out of several projects that I won't really talk about as the...阅读全文
1. 目标 使用 Golang 编写一个WebSocker 服务端 能接受客户端的WebSocket连接 启动服务器时接收命令行参数 能响应客户端数据 模式一 : webSocket 回音模式 模式二 : 图灵机器人聊天模式 使用Golang 编写一个WebSocket 客户端 使用 Vue 编写一个WebSocket 客户端 能和服务端通信 能主动获取WebSocket当前状态 能主动关闭WebSocket连接 能主动重新连接WebSokct连接 能显示WebSocket通信数据 2. 项目目录 |__common |____service_robot.go | server.go | myClient.go common\service_robot.go 图灵机器人服务 , 提供给其他服...阅读全文
<p>After using go for a bit I'm not seeing the obvious benefit of encapsulation. Is it that encapsulation covers the errors of not having multi-inheritance in most OO languages. And if that's the reason, can one just create a linear subclass list in the OO language if that effect was ever needed?</p> <hr/>**评论：**&l...阅读全文
<p>As an experiment I want to build something that works like a telnet-Client - opens a connection to a server and echoes everything the server sends, and write to the server whenever something is typed. I tried googling for examples, but all I find is opening a connection, send something, read something, close connection. I kind of want to k...阅读全文
<p>Hello All, </p> <p>I'm reading Golang and want to check if there are any open source project which uses channels in their code base. I would prefer any such libraries/code which will allow the beginner to pick and understand how channels work in real world. </p> <p>Thanks for your help.</p> <hr/&g...阅读全文
<p>I've tried finding examples of this but all I find when googling nodejs and golang together are articles comparing benchmark speeds. I'm trying to setup a basic development environment with two servers. One being a nodejs server that makes requests and gets responses from a golang server. Help me out please</p> <hr...阅读全文
