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DNS caching has been discussed multiple times in the past. The consensus seems to be that Go won't go there: github.com/golang/go/issues/24796

I've seen a few DNS caching solutions for Go (one, two), however, I haven't seen any implementations that allow replacing the net.DefaultResolver?

Package github.com/artyom/dot got me thinking if I could do the same for DNS caching, and also DNS over HTTPS.

So github.com/ncruces/go-dns is my attempt. Replacing net.DefaultResolver with a caching DNS over HTTPS resolver using 1.1.1.1 as the name server should be this simple:

net.DefaultResolver = dns.NewCachingResolver(dns.NewHTTPSResolver(

I feel like it's a dummy question, but I want to ask it anyway since I do not have much experience with concurrent programming.

In the app I am currently working on, someone wrote a code that should do something (in this case, printing "TICK!") every, let's say 5 minutes:

go func() {
   for {
       fmt.Println("TICK!")
       time.Sleep(5 * time.Minute)
   }
}()

最近做一个小型项目，因为rabbitMQ等专业软件比较重，故团队决定采用redis实现一个轻量的队列。

目标

在这篇文章中，你可以获得：

• redigo包的基本用法
• 初步认知context包的作用
• 了解一个功能模块的实现思路以及如何逐步完善的步骤
• Go特性(select、channel和goroutine)的利用

最终代码量大概265行左右。

阅读《Go语言学习笔记》随手摘抄——

数据

• 退化赋值操作：前提条件：至少有一个新变量被定义，且必须是同一作用域

  func main() {
    x := 100  // 定义新变量
    println(&x)
  
    x, y := 200, "abc"  // 只有y是被定义的新变量
  
    println(&x, x)
    println(y)