<p>I'm working on a project that keeps a set of services in a single monolithic repo. Each service has it's own source tree:</p> <pre><code>.git services/ serviceA/ # A Python project serviceB/ # A Java project </code></pre> <p>I want to introduce go to this structure. ...阅读全文
<p>Everyone makes fun of them but when you're inside one at 4am, you think "Thank God these are here"</p> <hr/>**评论：**<br/><br/>letshaveariot: <pre><p>Nobody ever wants one in the neighborhood, but once they're there, you realize you get everything you'd get from the ...阅读全文
<p>In C we have <time.h> and <code>clock()</code> and <code>CLOCKS_PER_SEC</code>, delivering consistent and reliable times, how to do this in Go?</p> <hr/>**评论：**<br/><br/>mcouturier: <pre><p>You can use the <a href="https://golang.org/pkg/testing/" rel="...阅读全文
<p>Hello everyone! </p> <p>I am writing a plain TCP server in Go, with the ultimate goal of replacing a Node process I have.</p> <p>The Go version of the program currently:</p> <ol> <li>Receives some data on a plain TCP socket</li> <li>Parses it into “event” and “payload” tags</li>...阅读全文
<p>For the example mentioned <a href="https://aws.amazon.com/blogs/compute/announcing-go-support-for-aws-lambda/" rel="nofollow">here</a>, how would you test it in your local development environment? I do not mean unit tests, but manual testing. How do I call the lambda service from a web browser or using curl and ...阅读全文
Tendermint 由于工作原因2年前开始接触Hyperledger Fabric，其社区还是很活跃的，已经从当年的v0.7发展到如今v2.0了。但不得不说Fabric的体量还是挺大的，对于二次开发来说有一定难度。所以最近开始转向Tendermint，因为Tendermint更简单、易于理解、性能更高（当然这是Tendermint自己标榜的），不过事实上相对于Fabric确实更易于理解，更方便开发区块链的应用系统。 摘要 Tendermint由两个主要部分组成，一个负责共识，一个负责应用程序接口，共识引擎称作Tendermint Core，应用程序接口称作ABCI（Application BlockChain Interface），利用ABCI可以开发自己业务逻辑。而Tendermint ...阅读全文
golang快速入门[2.3]-go语言开发环境配置-linuxlinux安装Go语言开发包默认读者会使用linux的基本操作配置go语言的开发环境的第一步是要在go官网下载页面下载开发包linux需要下载tar.gz压缩文件这里我们下载的是 64 位的开发包，如果读者的电脑是 32 位系统或者有特殊的需求，则需要下载 32 位的开发包在上图所示页面中向下滚动即可找到 32 位开发包的下载地址，如下图所示注意，如果在ubuntu这样有图形化界面的linux操作系统，我们可以直接下载没有图形化界面时，我们需要在命令行中操作第一步：下载开发包>> wget https://dl.google.com/go/go1.13.7.linux-amd64.tar.gz --2020-02-06 14:1...阅读全文
<p>Good morning,</p> <p>I'm planning to write a forum backend (basically just a rest api) in Go. This will be my very first project in Go with which I want to learn the language. I just want it to have the basics (register, login, open thread, answer to thread).</p> <p>Now I have to structure the whole projec...阅读全文
<p>Hi, I've been wondering about this for some time, but looking through the standard library package list as well as some of the packages, I've failed to find a way to do it.</p> <p>I'm beginning to doubt whether it's possible, which would explain why all the gui libraries I've seen rely o...阅读全文
<p>Ok, I know, Its personal and whatever. But im out of ideas. I really wanna try Golang. I like gothreads, building to one binary and its not so far from python. </p> <p>But thing is, I kinda like python and its fits completely in my perosonal (home) use. Ordinary I build web-scrapper to try language speed, syntax and tooling bu...阅读全文
<p>Hi,</p> <p>i have a question for all you golang ninjas! :)</p> <p>In my api code i am using the MongoDB driver mgo. I initialize the mgo.Session and mgo.Database in the InitSession method in model/db.go.</p> <p>I wrote a Datastore interface to distribute the database connection to all model methods t...阅读全文
<p>Golang persistence: I want the security of prepared statements, but I also want low GC pressure and not having to write boilerplate for nested structures and joins. Is there a well-tested, proven library out there for me? It seems like I have to choose between speed and security.</p> <hr/>**评论：**<br/><br/>kardianos:...阅读全文
<p>I'm interested in building an Alexa skill server on AWS Lambda using Go. I've done this using JavaScript but would like to try it out with Go. What's are good ways to use Go on Lambda and what are good skill servers/packages to use?</p> <p>Here are some of what I've seen:</p> <p>Go ...阅读全文
<p>Of any Go project you have done/been involved in, which is your favorite and why?</p> <hr/>**评论：**<br/><br/>KopfKrieg: <pre><p>Well, not directly involved, but: <a href="https://syncthing.net/">Syncthing</a></p></pre>poxopox: <pre><p>I think docker is one of my...阅读全文
<p>As far as I understood all of the golang routers (mux, chi, gin etc.) are based on the native golang http package but they claim to be faster than each other.</p> <p>How is this possible given that they are all based on the same package?</p> <hr/>**评论：**<br/><br/>shovelpost: <pre><p>Please d...阅读全文
<p>What comes to mind when considering 'simplicity and Go'?</p> <p>In particular:</p> <ul> <li>What is simple in Go the language and the platform.</li> <li>What isn't simple in Go</li> <li>Making your Go programs simple.</li> </ul> <p>Feel free ...阅读全文
<p>I've just been taking a look at the issues on GitHub to see if other people are experiencing an issue that I am when using Glide, and then realised that the last commit was on the 14th of December last year. I know just over a month doesn't seem like a long time, but I'd imagine that Glide would be the kind of proje...阅读全文
<p>Hey, so I am looking to make a video streaming application that will basically allow you to live stream video files from one device to another. In essence, the application is very similar to Plex media server, with some differences.</p> <p>I am sorry if this is less of a Go question, and more of a general programming question,...阅读全文
<p>I've written a simple REST API deployed on AWS elasticbeanstalk that talks to an AWS RDS. </p> <pre><code>package main import ( "database/sql" "encoding/json" "fmt" "log" "net/http" "os" _...阅读全文
<p>Assuming I have an API. When someone calls /register, the password is hashed, stored in the database and something is written to the log file. Would it make sense to start a goroutine for the logging part? Or should one just keep it as it is?</p> <p>Another example might be /information/placexyz. One goroutine would look up ap...阅读全文
<p>Hey there,</p> <p>I am aware that this is probably not the 100 percent correct subreddit for this question but since I am currently working mostly with go and also since my current goal is to improve my design of Go programs I wanted to start here.</p> <p>So I was watching this wonderful talk <a href="https...阅读全文
<p>My company uses Plesk as a solution to manage hosts. They write websites using php. I wonder, how can I find this kind of solution to manage hosts, but I want to write apps with Go. Is it possible to use Plesk and still write with Go? If the question sounds stupid you don't have to answer.</p> <hr/>**评论：**<br/><...阅读全文
<p>I remember seeing a GitHub repo about a wrapper around a AWS Lambda handler to convert it to a normal http.HandlerFunc somewhere but I can't seem to find it now.</p> <p>Anyone knows where it is? Or does it even exist?</p> <hr/>**评论：**<br/><br/>Jamo008: <pre><p><a href="https:/...阅读全文
<p>Most types I see in Go are used either as a pointer or a value. <code>bytes.Buffer</code>, for example, is used as a pointer. I can imagine why. <code>bytes.Buffer</code> implements <code>Reader</code>, <code>Writer</code> and other IO interfaces on it's pointer type. </p> &...阅读全文
<p>I used Apache in the past, for hosting PHP websites. I know very little about NGINX but from what I understand it's also a web/mail server. </p> <p>How do most developers use Go on the server, do they install the web server software together with the Go program, or do they use the stdlib http/smtp server? </p> &...阅读全文
<p>In a web server I'm working on, every request may issue a couple of SQL queries.</p> <p>I'm thinking, why not have a separate transaction per request to ensure any changes get rolled back in case the handling of the request failed?</p> <p>For instance, in a user registration, I may insert a record ...阅读全文
<p>Hello, I'm learning Go while building a little project on the side. I have to say Go has been awesome to learn in its own right, and an awesome tool for learning how to do more than frontend stuff in JS.</p> <p>I need a db for my project now, and everywhere I look, people say I should pick the right db for the job; onl...阅读全文
<p>Here is a list of my benchmark result</p> <pre><code>// One function that uses goroutine 300000 8213 ns/op 300000 6364 ns/op 500000 5611 ns/op 300000 6243 ns/op 300000 6003 ns/op 500000 11680 ns/op // One function that does not use goroutine 3000000 425 ns/op 3000000 ...阅读全文
<p>Hi,</p> <p>My question is based around this toy example: <a href="https://play.golang.org/p/94bQZK7olb" rel="nofollow">https://play.golang.org/p/94bQZK7olb</a></p> <p>In order for me to be able to change the name inside the v1 struct, I need a pointer instance. However, I can use a valu...阅读全文
<hr/>**评论：**<br/><br/>sh41: <pre><p>I personally think it's one of the best programming languages to start with. I wish I could've started with it first. The only thing it won't teach you is frustration of using other less pleasant languages, so you might not have enough context to appreciate so...阅读全文
<p>Just curious about what people are getting their hands dirty with.</p> <p>I'm currently building a project involving MongoDB and some APIs to create a website and at the same time learn some Go.</p> <hr/>**评论：**<br/><br/>gbrayut: <pre><p>About to start month 6 at my "new&...阅读全文
<p>Hi all,</p> <p>I am currently interested in floating point determinism in golang - especially cross platform. As golang adheres to the IEEE-Standard, this should be a given, with the exception of possibilities like compiler optimisations and/or different libraries (e.g. for square roots) which are imported from C.</p> &...阅读全文
<p>I'm an engineer on the Azure containers team, formerly an engineer at Deis (which was acquired by Microsoft). We're looking for Go engineers to work on Kubernetes and related cloud/distributed systems. The job description is <a href="https://careers.microsoft.com/jobdetails.aspx?ss=&pg=0&so=&r...阅读全文
Go 语言和 Erlang 都是面向并发应用的语言，都采用轻量级线程和消息传递模型。尽管Go在语法上也支持共享，但必须以通信的方式同步方能保证其正确性。Erlang则是完全不支持进程间的共享，状态信息完全需要依靠消息彼此传递。从底层来看，在 Google 官方编译器中，Go 语言的 Goroutine 是一种类似协程的结构，由于采用了定制的C编译器来构建，因此其上下文切换的效率要高于C库的 coroutine（只需要切换PC和栈帧，其他寄存器由函数调用者负责保存）； 而在 Go 的 GCC 前端中，Goroutine 则直接由C库的 coroutine 机制实现。由于 Erlang 是基于 BEAM 虚拟机执行的，因此它的所谓 “轻量进程” 也就仅仅是 BEAM 上的概念，不对应C语言或OS...阅读全文
<p>I have an API service that at some point should make an http request to an API service that checks access rights. Is there any point of making that call concurrently in contrast to simply making a call?</p> <p>For example, </p> <pre><code>func VerifyAccess(someParam string) (bool,error) { //Should I mak...阅读全文
<p>I'm giving a talk at GoSF on March 23 walking through how experienced Gophers reviewed and improved a couple of real open-source libraries, nominated by their creators here in this thread. The reviews will occur in the open and will come in the form of multiple mergeable pull requests to your library in the next 30 days.</p> ...阅读全文
<p>Hello! Could anyone share best practice for subj. I have 2 PC. One for internet and one for dev. </p> <p>Internet PC has no admin rights so no installation. Only portable. </p> <p>Dev PC has no Internet connection. But has admin rights. So install Go env, gogland and so - is not problem.</p> <p>Probl...阅读全文
<p>So we wrote a go service which does 30k+QPS using ZMQ(via cgo calls) on a 16 core EC2 instance.</p> <p>We now want to put it on a private cloud with 56 core VM. We want to scale up and there are 2 ways we can do it.</p> <ol> <li>Launch 4 instances of same service as it is with config changes.</li> <...阅读全文
<p>If I'm analysing a dataset asynchronously using several goroutines but I don't want to accidently hit the same thing more than once I want to have a blacklist that's updated as they go.</p> <p>Problem is I'm wondering the best way to do this, my synchronous idea would be use a blacklist array to...阅读全文
<p>I work daily in Java (sad, but true), and appreciate there are some cases where generics are really handy. Most examples, to my eye, are sinful. Here are a couple sinful examples:</p> <pre><code>Map<String, List<Map<String, String>>> public class FiniteStateMachine<S exten...阅读全文
<p>Which external packages you believe are so well-written, clean, battle-tested or otherwise awesome enough that you would like them to become part of the standard library in the future?</p> <hr/>**评论：**<br/><br/>dchapes: <pre><p>The Go authors are doing the reverse, keeping new stuff out of the standard l...阅读全文
<p>According to modulecounts.com Golang's daily module output is currently only 3. Compared with 90 for Python it doesn't seem to make sense. </p> <hr/>**评论：**<br/><br/>scottjbarr: <pre><p>I'm don't know how they're counting packages.</p> <p>I see the fant...阅读全文
Go语言的依赖管理随着版本的更迭正逐渐完善起来。 windows开启go module：set GO111MODULE=on Linux开启go module：export GO111MODULE=on 依赖管理 为什么需要依赖管理 最早的时候，Go所依赖的所有的第三方库都放在GOPATH这个目录下面。这就导致了同一个库只能保存一个版本的代码。如果不同的项目依赖同一个第三方的库的不同版本，应该怎么解决？ godep Go语言从v1.5开始开始引入vendor模式，如果项目目录下有vendor目录，那么go工具链会优先使用vendor内的包进行编译、测试等。 godep是一个通过vender模式实现的Go语言的第三方依赖管理工具，类似的还有由社区维护准官方包管理工具dep。 安装 执行以下命令...阅读全文
<p>I'm working on a personal project with Go, and I'm relatively new to it. Part of what I'm doing involves repeatedly reading data out of a Reader in 2-8 byte chunks. The Go way of handling errors (as far as I've found) is to use a pattern like this:</p> <pre><code>content := make([]byte, le...阅读全文
<p>I've written a couple of web crawler-type programs in Go, and whenever I do, I run into the question of how many worker goroutines I should spawn. It has to be limited to keep from exhausting file descriptors, but what is a good limit? I usually just spawn 10 or 20 because those seem to give decent performance, but is there a good ...阅读全文
