<p>I understand that <code>error</code> is an interface, and that in theory there are lots of choices for what to satisfy that interface. However, in practice, what tends to be chosen?</p> <p>When is <code>errors.New</code> or <code>fmt.Errorf</code> preferred? Should those be the default, in t...阅读全文
<p>Don't know what anyone could use this for but i made it anyways it was just something i did while waiting for a game to update. </p> <p>Github: <a href="https://github.com/SaturnsVoid/Junk-Go-Generator" rel="nofollow">https://github.com/SaturnsVoid/Junk-Go-Generator</a></p> <hr/>...阅读全文
<p>To get the ast.Package, I currently use go/build.Default.Import to get the go/build.Package, then use go/parser.ParseDir with a filter function that only allows the build.Package.GoFiles files. That all seems to work, and everything seems to get parsed, but the Objects I mentioned above is nil.</p> <p>(I need the package-level...阅读全文
依赖分布式系统的公司组织和团队经常使用Go语言编写其应用程序，以利用Go语言诸如通道和goroutine之类的并发功能。如果你负责研发或运维Go应用程序，则考虑周全的日志记录策略可以帮助你了解用户行为，定位错误并监控应用程序的性能。 这篇文章将展开聊一些用于管理Go日志的工具和技术。我们将首先考虑要使用哪种日志记录包来满足各种记录要求。然后会介绍一些使日志更易于搜索和可靠，减少日志资源占用以及使日志消息标准化的技术。 日志包的选择 Go标准库的日志库非常简单,仅仅提供了print,panic和fatal三个函数对于更精细的日志级别、日志文件分割以及日志分发等方面并没有提供支持. 所以催生了很多第三方的日志库，流行的日志框架包括logrus、zap、glog等。我们先来大致看下这些日志库的特点...阅读全文
<p><a href="https://github.com/o1egl/govatar" rel="nofollow">https://github.com/o1egl/govatar</a></p> <hr/>**评论：**<br/><br/>strothjs: <pre><p>This looks really cool, nice work!</p></pre>neoasterisk: <pre><p>Very good work!</p> <p>Also <code&...阅读全文
<p>I am new to golang. Employer send me a test exercise and turned me down without further explanations.</p> <p>I'll appreciate if someone would tell me what's wrong with my code, there're only 110 lines of it. Here's a link with test description and implementation:</p> <p><a href=&...阅读全文
<p>Hi guys, I just wrote an simple package. <a href="https://github.com/chyeh/pubip" rel="nofollow">https://github.com/chyeh/pubip</a> I'm still considered a newbie as a programmer. Some people told me if I want to get some suggestions, just post it on Reddit. Thanks for taking a look!</p>...阅读全文
<p>I've got a json file that I'm basically using as a database for this little todolist program I'm writing for myself. My question is, what would be the best way to write to the file, and modify its contents? Currently I've got a suitable struct that holds all the contents of todos, and I'd like to be ...阅读全文
<p>Hi all, </p> <p>I'm currently making a <a href="https://github.com/sirkaiserkai/go-diawi/tree/master" rel="nofollow">package</a> that wraps the client functionality for a web service called <a href="https://www.diawi.com/" rel="nofollow">diawi</a>. For background,...阅读全文
<p>Is there a mux that handles functions with extra parameters? I don't want to do the boilerplate code to convert MyHandler to http.Handler if I can avoid it. This code would probably be similar to how Spring Boot controllers and Django urldispatchers work. </p> <pre><code>package main import ( "custom...阅读全文
<p>Hi everybody,</p> <p>there are some MIDI implementations written in Go, but they are mostly incomplete and don't have a common interface for SMF and live data.</p> <p>So I spend some time to figure out the API and get it complete (although test coverage is not complete yet).</p> <p>Anyway I ne...阅读全文
<p>I wrote a simple web app for fun that deals with processing meme images, and have a load test server that send traffic to it occasionally. I find out that occasionally the web app just fails silently.</p> <p>I have no idea why it just fails, but looks like the web server just quits.</p> <p>Right now to make sure ...阅读全文
<p>Hey guys, </p> <p>Does anyone have any links to some (beginner) cool projects I can do in go and deploy on a Raspberry Pi?</p> <hr/>**评论：**<br/><br/>miggimaggi: <pre><p>dns proxy for ad blocking: <a href="https://github.com/seedifferently/nogo" rel="nofollow">https://gi...阅读全文
<p>TL;DR- Can we audit golang file providing function supposed to have no side-effects with just <code>grep import</code>?</p> <p>Given golang source file, providing functions, structures, that does not import anything, can I assume that this package works with no other side-effects than within package scope, cpu and ...阅读全文
<p>I'm new to go, coming mainly from Python. I wanted to know if there are any REST API frameworks that generate the API documentation as you build the code. The best example of this is <a href="http://www.django-rest-framework.org/">django-rest-framework</a>, <a href="http://flask-restful-swagger.readthedoc...阅读全文
<p>I have a struct, User, shown below:</p> <pre><code> type User struct { DbID string DbUsername string DbPasswordHash string DbPasswordSalt string } </code></pre> <p>I query my database, like so:</p> <pre><code> rows, err := d...阅读全文
<p>I am very inexperienced in the golang world so it's safe to assume I know nothing. </p> <p>What do tools like glide/godep provide that <code>go get ...</code> doesn't handle?</p> <p>What is vendoring in the go ecosystem?</p> <p>Is it similar to specifying a version in insta...阅读全文
<p>With <a href="http://jsonapi.org/">JSON API</a>, it's becoming more standard to let users define the fields they want to receive back from an API call:</p> <p><code>GET /articles?fields[articles]=title,body,author&filter[title]=Go</code></p> <p>One can imagine this a...阅读全文
<p>Hi folks. </p> <p><a href="https://github.com/Skarlso/go-furnace">Furnace</a> is a Go application which simplifies the usage of AWS' CloudFormation service to a digestible API using only <code>create</code>, <code>delete</code>, <code>update</code>, <code&g...阅读全文
<p>I'm looking for a tool that will take a string, something like "every day at 9:00 am" and convert that into a <code>time.Time</code> object and probably a <code>time.Duration</code> object to denote repetition. I was hoping <a href="https://github.com/dustin/go-humanize">go-huma...阅读全文
<p>If you do how do you go about doing it? I attempted to use <a href="https://github.com/metaleap/go-xsd" rel="nofollow">https://github.com/metaleap/go-xsd</a> but the XSD in question is much to large and unwieldy and potentially not super well formed (its from a 3rd party company), I have been struggling for a fe...阅读全文
<p>Hello all, I am using Go to do homework in a database class rather than my usual Python as a way to learn Go. So I've learned how to scan data from a query directly into a struct using sqlx, but I have a question on the structs themselves. The example database has these tables: Pets, Customers, Visits, Owner History. (It's ...阅读全文
<hr/>**评论：**<br/><br/>cyrusol: <pre><p><a href="https://www.youtube.com/watch?v=cN_DpYBzKso">Concurrency is not Parallelism</a>, a talk by Rob Pike. Very helpful for wrapping your mind around Go's concurrency concepts.</p> <p>Which are actually very old ones envisioned by Tony Ho...阅读全文
<p>Hey all,</p> <p>I am following the code in <a href="https://blog.kowalczyk.info/article/f/accessing-github-api-from-go.html" rel="nofollow">this article</a> where in order to login with GitHub, a <code>handleGitHubLogin</code> handler is used for the Oauth request and <code>handleG...阅读全文
<p>I am working on a project that uses sockets for communication between multiple clients and a server. The sockets are used, because the clients can make a request to the server to perform a certain multi-step action and the server must provide feedback to the client after each step is completed. Essentially it is still similar to an http AP...阅读全文
<p>Hey guys,</p> <p>I was going through <a href="https://github.com/golang/tour/blob/master/solutions/loops.go" rel="nofollow">this solution</a> from the Go Tour and saw this snippet of code:</p> <pre><code>for math.Abs(n-z) > delta { n, z = z, z-(z*z-x)/(2*z) } </code&...阅读全文
<p>As a beginner, there seem to be so many options - the popular ones are Gin, Gorilla, HttpRouter and probably dozens of lesser-known ones.</p> <p>What's the idiomatic way in 2017 to write REST APIs in Go?</p> <hr/>**评论：**<br/><br/>nathj07: <pre><p>As a general rule stick the standard ...阅读全文
<p>Do you guys test for coverage when you pass an error along?</p> <p>For a specific example say I'm using database/sql with a driver and I know the driver returns errors. I want to pass those errors along to the caller but I feel that testing these is really testing the driver implementation. </p> <p>Am I wr...阅读全文
<p>Go seems very interesting.</p> <p>Currently, I build web sites, web applications and sometimes native apps. I use a bunch of different languages and frameworks includiny PHP, TypeScript (client React and server Node) with Node, C#.NET Core, Elm, Ruby (on Rails), some static site generators written in Ruby and more.</p> ...阅读全文
<p>I'm looking to get a better grasp on how boltdb works under the hood. Reading the source is great but I'm looking for something to help understand some of the concepts/rationale behind the code. </p> <p>A walkthrough type piece is what I'm looking for - but any lower level explanations would be great to...阅读全文
<p>Does someone know which is the largest opensource go codebase in existence?</p> <hr/>**评论：**<br/><br/>Kraigius: <pre><p>Probably Go repo itself, no?</p> <p><a href="https://github.com/golang/go" rel="nofollow">https://github.com/golang/go</a></p></pre>...阅读全文
<p>Is it possible to programmatically create Docker containers using Go ?</p> <hr/>**评论：**<br/><br/>robe_and_wizard_hat: <pre><p>There is a docker client API in go:</p> <p><a href="https://github.com/moby/moby/tree/master/client" rel="nofollow">https://github.com/moby/moby/...阅读全文
<p>I'm working on a library for handling a wire protocol that sends specific messages where elements could be represented by bits in a byte, a fixed byte or word, or even a variable array of bytes. The methods in encoding/binary sounds great for my purpose except they only work with fixed length fields. It is important for my project ...阅读全文
<p>Hey <a href="/r/golang">/r/golang</a>,</p> <p>I just started learning ruby/rails about a month ago and noticed that Go has been picking up a lot of traction these days.</p> <p>While I enjoy the syntax of ruby and also the rails community, I'm curious if I should look into Go instead. My...阅读全文
<p>I am curious how do you people work with Go in an enterprise environments when you often need to talk to unknown (often shitty) SOAP endpoints or consume messages from proprietary MQs etc. How do you deal with it ?</p> <hr/>**评论：**<br/><br/>egonelbre: <pre><p>It really doesn't differ much from ot...阅读全文
<p>I Have found that when writing unit tests, I often have a slice of an implicitly defined struct called <code>cases</code> where I have an input and an output, and later I have a for loop that iterates over said cases slice. I often have to type very simlilar code over many unit tests, which is bad practice from my understanding...阅读全文
<p>Say I have XML like this:</p> <pre><code><ITEMS> <ITEM INDEX="1"> <NAME>foo</NAME> <TYPE ID="123">bar</TYPE> </ITEM> </ITEMS> </code></pre> <p>I ca...阅读全文
今天这篇文章我们将会为我们之前编写的HTTP服务器加上复杂路由的功能以及对路由进行分组管理。在之前的文章《深入学习用 Go 编写HTTP服务器》中详细地讲了使用net/http进行路由注册、监听网络连接、处理请求、安全关停服务的实现方法，使用起来非常方便。但是net/http有一点做的不是非常好的是，它没有提供类似URL片段解析、路由参数绑定这样的复杂路由功能。好在在Go社区中有一个非常流行的gorilla/mux包，它提供了对复杂路由功能的支持。在今天这篇文章中我们将探究如何用gorilla/mux包来创建具有命名参数、GET/POST处理、分组前缀、限制访问域名的路由。 安装gorilla/mux包 我们在之前写的HTTP服务的代码根目录，使用go get命令从GitHub安装软件包，如...阅读全文
移除元素（Remove-Element） 题干如下： 给你一个数组 nums 和一个值 val，你需要 原地 移除所有数值等于 val 的元素，并返回移除后数组的新长度。不要使用额外的数组空间，你必须仅使用 O(1) 额外空间并 原地 修改输入数组。元素的顺序可以改变。你不需要考虑数组中超出新长度后面的元素。示例 1: 给定 nums = [3,2,2,3], val = 3, 函数应该返回新的长度 2, 并且 nums 中的前两个元素均为 2。 你不需要考虑数组中超出新长度后面的元素。示例 2:给定 nums = [0,1,2,2,3,0,4,2], val = 2,函数应该返回新的长度 5, 并且 nums 中的前五个元素为 0, 1, 3, 0, 4。注意这五个元素可为任意顺序。你不需...阅读全文
<p>Was wondering if anyone had any experience with analyzing the traffic coming from QUIC? If so besides using WireShark, and anything else see QUIC decrypted over the wire?</p> <hr/>**评论：**<br/><br/>knotdjb: <pre><p>If you're feeling up to it, you could write a dissector using <a href="https...阅读全文
<p>I'm currently watching a stream of an NFL wildcard game, and the streamer unfortunately adds their own incredibly annoying sound effects at random times during the stream. Because my computer is plugged into an HDMI adapter into the tv away from me, I thought it might be a fun little project to figure out how to use Go to write a p...阅读全文
<p>I am learning go and was curious on how to use go maps to solve the conventional fizzbuzz problem, i.e. print number from say, 1-100 and multiples of 3 & 5 get printed fizz and buzz respectively. I looked over a bunch of solutions in different languages but somehow can't produce the same results in go. Thanks in advance.<...阅读全文
<p>I'm currently working on a graphql api and wanna implement the database with psql. I know that go offers the database/sql library out of the box, but since I'm looking to work with postgres, I'm supposed to use some drivers. So far I've seen this package <a href="https://github.com/jackc/pgx" rel=...阅读全文
<p>I'm in need of writing a text indexer which operates similar to a basic SQL database. Ie, rows/objects of data, and the ability to perform basic queries against that data like <code>columnA==5 && columnB == 6</code>. The rows will be schemaless as well.</p> <p>With that said, i've ne...阅读全文
