type MyError struct { msg string } func (e *MyError) Error() string { return e.msg } func checkError(e error) { if e != nil { println("false") } else { println("true") } } func main() { var err *MyError = nil checkError(err) // e == nil ? } 在main 函数中,我们...
1// 请求失败造成 panic2funcmain(){3resp,err:=http.Get("https://api.ipify.org?format=json")4defer resp.Body.Close()// resp 可能为 nil,不能读取 Body5iferr!=nil{6fmt.Println(err)7return8}910body,err:=ioutil.ReadAll(resp.Body)11checkError(err)1213fmt.Println(string(body))14}1516fu...
$ go tool pprof http://127.0.0.1:6060/debug/pprof/profile?seconds=30Saved profilein/root/pprof/pprof.demo.samples.CPU.001.pb.gzFile:demoType:CPUTime:Dec24,2023at11:42am(CST)Duration:10s,Total samples=70ms(0.7%)Entering interactivemode(type"help"forcommands,"o"foroptions)(pprof) 1.1.2 ...
背景Golang 中, 一般通过返回 error 判定函数异常. 常用的模式是: if err != nil { panic(err) // 更多的是 return err } 这样的代码片会遍布代码库时就会很烦, 所以有人就想少写两行: checkErr(err) func checkErr(err error) { if err != nil { panic(err) } } 当然, 有
{/* Both are incremental. Thus we have "SS" test. Check if theyare in the same sequence. */u32avg=(hss->ipid.tcp_ipids[good_tcp_ipid_num-1]-hss->ipid.tcp_ipids[0])/(good_tcp_ipid_num-1);if(hss->ipid.icmp_ipids[0]<hss->ipid.tcp_ipids[good_tcp_ipid_num-1]+3*avg){...
Gin is a HTTP web framework written in Go (Golang). It features a Martini-like API with much better performance -- up to 40 times faster. If you need smashing performance, get yourself some Gin. - gin-gonic/gin
type TradeValidator struct {} func (tv *TradeValidator) Validate(trade *Trade) error { if trade.Quantity <= 0 { return errors.New("Trade quantity must be greater than zero") } if trade.Price <= 0 { return errors.New("Trade price must be greater than zero") ...
Golang - Map 内部实现原理解析 一.前言 Golang中Map存储的是kv键值对,采用哈希表作为底层实现,用拉链法解决hash冲突 本文Go版本:gov1.14.4,源码位于src/runtime/map.go 二.Map的内存模型 在源码中,表示map的结构体是hmap,是hashma
Join us on Discordto say hi and ask questions, orcheck out our roadmapto see what we're building next. Video Introduction What's it for? Lots of things! Dolt is a generally useful tool with countless applications. But if you want some ideas,here's how people are using it so far. ...
newcomer at Google, and Rob invited Russ for joining the Go team since he knew Russ from way back because of thePlan 9project. Russ did many fundamental work for the early Go compiler, runtime, as well as the leap of Go 1.5 bootstrap. Now, Russ is the tech leader of the Go team....