It highly depends on what you’re trying to do, and what kind of data you’re expecting, for example if you just want to read until the EOF you could use something like this: func main() { conn, err := net.Dial(“tcp”, “google.com:80”) if err != nil { fmt.Println(“dial error:”, err) return } defer conn.Close() fmt.Fprintf(conn, “GET … Read more
Yes, it is possible. Assuming a and b have the same type, the example provided will work just fine. For example: a, b := “second”, “first” fmt.Println(a, b) // Prints “second first” b, a = a, b fmt.Println(a, b) // Prints “first second” Run sample on the playground This is both legal and idiomatic, so … Read more
There is no single correct answer, nor are there any strong conventions assumed or enforced by any Go tooling at this time. Typically I start by assuming that the files I need are located in the same directory from where the program will be run. For instance, suppose I need conf.json for myprog.go; then both … Read more
Is my understanding correct? Yes. Is there a way to scope it to the block […]? There is no way to change how defer works. Depending on the problem you are trying to solve, perhaps splitting your function (first example below) or defining anonymous functions (second example) would help. The latter just for reference and … Read more
You just have to check flag.NArg(). From https://golang.org/pkg/flag/#NArg: NArg is the number of arguments remaining after flags have been processed. flag.Parse() if flag.NArg() == 0 { flag.Usage() os.Exit(1) }
The solution here seems to be that the library I’m trying to use needs to be reworked to prevent this kind of thing from happening. The two possible ways to change the library seem to be 1) not vendor at all – this works if the dependency does not need to be a specific version. … Read more
These methods differ in the level of abstraction. If a higher level abstraction fits your need, you should use it, as many lower level problems is solved for you. Informers is a higher level of abstraction than watch that also include listers. In most use cases you should use any kind of Informer instead of … Read more
Take a look here: http://dave.cheney.net/2014/10/22/simple-profiling-package-moved-updated https://github.com/pkg/profile func main() { defer profile.Start(profile.CPUProfile, profile.ProfilePath(“.”)).Stop() // Rest of program } Build and run your program as per normal. You’ll see the profiling hook mentioned: 2015/07/12 09:02:02 profile: cpu profiling enabled, cpu.pprof Run your program (bench it, run through it, etc) to generate the profile during runtime. Once you’ve … Read more
The C atexit functionality was considered by the Go developers and the idea of adopting it was rejected. From one of the related thread at golang-nuts: Russ Cox: Atexit may make sense in single-threaded, short-lived programs, but I am skeptical that it has a place in a long-running multi-threaded server. I’ve seen many C++ programs … Read more
For the package newmath it’s the same as (later 2.) $ mkdir $GOPATH/src/github.com/username/newmath $ cd $GOPATH/src/github.com/username/newmath $ git init $ … more git setup $ touch sqrt.go $ gvim sqrt.go $ git add sqrt.go $ git commit -a -m ‘Inital commit’ $ git push Now people can do $ go get github.com/username/newmath and import “github.com/username/newmath” … Read more