For Golang beginners, it is crucial to understand common problems and learn to solve them. This guide provides detailed solutions to common problems and is designed to help you get started with Golang quickly.
Solution:
# Linux/macOS wget https://golang.org/dl/go1.19.3.linux-amd64.tar.gz # 这里替换为最新版本 tar -xvf go1.19.3.linux-amd64.tar.gz sudo mv go /usr/local # Windows 下载官方 Windows 安装程序并按照提示安装
Solution:
Golang will automatically configure $GOPATH
. If you need to customize, please set the environment variables manually:
export GOPATH=/my/custom/path
Solution:
go build main.go
Solution:
./main
Solution:
import ( "fmt" "time" )
package main import "fmt" func main() { fmt.Println("Hello, world!") }
Run the program:
go run main.go
Output:
Hello, world!
Solution:
Use dlv
debugger:
go install github.com/go-delve/delve/cmd/dlv dlv debug --api-version=2 main.go
Now you can use the dlv
command to program Perform debugging.
Solution:
Useerrors
Package:
import "errors" func myFunc() error { return errors.New("my error message") }
Solution:
Use sync
and runtime
Package:
import ( "runtime" "sync" ) func main() { var wg sync.WaitGroup for i := 0; i < 10; i++ { wg.Add(1) go func(i int) { defer wg.Done() time.Sleep(time.Millisecond * 100) fmt.Println("Goroutine", i) }(i) } wg.Wait() fmt.Println("All goroutines finished") }
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