https://raghavxk8s.com/categories/golang/ Recent content in Golang on AI Infra Hugo -- gohugo.io en-us Tue, 16 Jul 2019 02:24:33 +0000 https://raghavxk8s.com/post/go-synchronization/ Tue, 16 Jul 2019 02:24:33 +0000 https://raghavxk8s.com/post/go-synchronization/ *sync.Mutex m := sync.Mutex m.Lock() // for locking m.Unlock() // for unlocking sync.RWMutex m := sync.RWMutex // Read lock & Read unlock. m.RLock() m.RUnlock() // for Write locks & write unlocks m.Lock() m.Unlock() sync.WaitGroup e.g. func main() { var wg sync.WaitGroup wg.Add(1) go func() { fmt.Println("Inside my goroutine") wg.Done() }() wg.Wait() fmt.Println("Finished Execution") } https://raghavxk8s.com/post/go-types/ Mon, 17 Jun 2019 16:55:16 +0000 https://raghavxk8s.com/post/go-types/ Types Built-in types bool string Numeric: int (either 32 or 64bit) uint (either 32 or 64 bit) uint8, uint16, uint32, uint64 (all Unsigned 8, 16, 32, 64 bit integers respectively) int8, init16, int32 ,int64 (signed integers) float32 float64 Type conversions; T(v) converts value v to T type. a := 10 b := float64(a) var u uint = uint(b) Type Assertion Type assertion takes a value and tries to create another version in the specified explicit type. https://raghavxk8s.com/post/go-functions/ Mon, 17 Jun 2019 16:08:53 +0000 https://raghavxk8s.com/post/go-functions/ function declaration Syntaxt func <nameOfTheFunction>(arg1 typ1, arg2 type2) <returnType> () { ... } e.g. func add(a int, b int) int { return a+b } -- Above function can be written as func add(a, b int) int { } e.g. func location(city string) (state, country string) { ... ... return "BLR", "India" } https://raghavxk8s.com/post/go-variables/ Mon, 17 Jun 2019 14:44:35 +0000 https://raghavxk8s.com/post/go-variables/ Variables declaration in go Declaratoin var ( name string age int city string ) -- var ( name, city string age int ) -- var name string var city string var age int Initialization var ( name string = "Chari" city string = "BLR" mobile int = 12345 ) -- Inferred typing var ( name = "Chari" city = "BLR" mobile = 12345 ) -- var ( name, city, mobile = "Chari", "BLR", 12345 ) Short assignment “:=” (Inside a function only) https://raghavxk8s.com/post/go-format-output/ Mon, 17 Jun 2019 11:30:18 +0000 https://raghavxk8s.com/post/go-format-output/ Printing the verbs General %v the value in a default format when printing structs, the plus flag (%+v) adds field names %#v a Go-syntax representation of the value %T a Go-syntax representation of the type of the value %% a literal percent sign; consumes no value // Examples package main import ( "fmt" ) type rect struct { height float64 width float64 } func main() { r := rect{height : 12, width: 15} fmt. https://raghavxk8s.com/post/go-basics/ Mon, 17 Jun 2019 06:49:18 +0000 https://raghavxk8s.com/post/go-basics/ command line args – main.go package main import ( "os" "fmt" ) func main() { argsWithProgramName := os.Args argsWithoutProgramName := os.Args[1:] fmt.Println(argsWithProg) fmt.Println(argsWithoutProg) } -- OUTPUT -- PS C:\Users\INTEL\Desktop\golang> go run .\main.go "a b c" "sdf" [C:\Users\INTEL\AppData\Local\Temp\go-build928898898\b001\exe\main.exe a b c sdf] [a b c sdf] Reading Files package main import ( "os" "fmt" "bufio" "log" ) func main() { f, err := os.Open("logfile.log") if err != nil { log. https://raghavxk8s.com/post/golang-setup/ Sun, 16 Jun 2019 16:07:54 +0000 https://raghavxk8s.com/post/golang-setup/ Installing Golang on Ubuntu We will be using snappy tool to install go on ubuntu. Ref: snappy Get info for go packages availabe. ``` $ snap info go name: go summary: Go programming language compiler, linker, stdlib publisher: Michael Hudson-Doyle (mwhudson) contact: michael.hudson@ubuntu.com license: unset description: | This snap provides an assembler, compiler, linker, and compiled libraries for the Go programming language. commands: go go.gofmt snap-id: Md1HBASHzP4i0bniScAjXGnOII9cEK6e tracking: stable refresh-date: 2 days ago, at 07:00 IST channels: stable: 1.