Go

zap # go get -u go.uber.org/zap 初始化logger # package logs import ( "os" "github.com/natefinch/lumberjack" "go.uber.org/zap" "go.uber.org/zap/zapcore" ) func InitLogger() { // 生

viper # go get github.com/spf13/viper 封装加载配置方法 # package configs import "github.com/spf13/viper" func LoadConfig(filepath string, encoding string, config interface{}) error { vp := viper.New()

WaitGroup # type WaitGroup func (wg *WaitGroup) Add(delta int) func (wg *WaitGroup) Done() func (wg *WaitGroup) Wait() package main import ( "fmt" "sync" ) func main() { var wg sync.WaitGroup

时间转换 # func Now() Time // Now returns the current local time. func Unix(sec int64, nsec int64) Time func UnixMicro(usec int64) Time // Go v1.17 func UnixMilli(msec

singleflight应用在什么场景 # singleflig

defer的用途 # defer是在函数执行到最后时（retur

读取文件全部内容 # ioutil.ReadFile(filename string) package main import ( "fmt" "io/ioutil" ) func main(){ content, err := ioutil.ReadFile("test.txt") if err != nil { fmt.Printf("read

sync.Once 实现单例模式 # package singleton import "sync" type singleton struct { // 单例对象的状态 } var ( instance *singleton once

前端请求接口跨域 # 前端报错信息 Request header field content-type is not allowed by Access-Control-Allow-Headers in preflight 原因及解

依赖 # protoc wget https://github.com/protocolbuffers/protobuf/releases/download/v21.12/protoc-21.12-linux-x86_64.zip unzip protoc-21.12-linux-x86_64.zip cd protoc-21.12-linux-x86_64 ./configure make sudo make install protoc-gen-go、p