For example, package main import “fmt” func div(a int, b int) (int, bool) { if a%b == 0 { c := a % b return c, true } else { c := a % b return c, false } } func main() { fmt.Println(div(4, 2)) // should return (0, true) fmt.Println(div(4, 3)) // should return … Read more
I am trying to install Go lang packages but it gives error like this ::error: The following untracked working tree files would be overwritten by merge solved I am trying to install Go lang packages but it gives error like this ::error: The following untracked working tree files would be overwritten by merge
Solution (w is the responseWriter) str := “{\”key1\”:{\”key2\”:\”value1\”,\”key3\”:\”value2\”}}” w.Write([]byte(str)) 2 solved Encode arbitrary string to JSON in http response
You don’t have to use the shell for redirection, you can just let Go do it: package main import ( “os” “os/exec” ) func main() { f, e := os.Create(“requirements.txt”) if e != nil { panic(e) } defer f.Close() c := exec.Command( “docker”, “exec”, “-it”, “demoContainer”, “bash”, “-c”, “pip freeze”, ) c.Stdout = f c.Run() … Read more
You need to set the correct working directory in your script using WorkingDirectory= – presumably: WorkingDirectory=/var/www/html/scarga.local 1 solved No such file or directory when run as service?
This part of the function signature is exactly what the function returns. (*PutRecordOutput, error) So this one will return a pointer to a PutRecordOutput plus an error (which by convention is returned as nil if no error occurred). If you look at the source code for the function, return statements will have to be consistent … Read more
to use a function from another package, you need to export it (GetUserDetails) as said here An identifier may be exported to permit access to it from another package func GetUserDetails(w http.ResponseWriter, r *http.Request) { fmt.Println(“here”) message := “Hello World” w.Write([]byte(message)) } solved How to access another file in GO
I think instead of fasthttp is single process?, you’re asking whether fasthttp handles client requests concurrently or not? I’m pretty sure that any server (including fasthttp) package will handle client requests concurrently. You should write a test/benchmark instead of manually access the server through several browsers. The following is an example of such test code: … Read more
The IndicesCreateService.Do() function expects a context.Context to be passed. So, you need to import “golang.org/x/net/context” and then change your call to this: import ( … your other imports… “golang.org/x/net/context” ) … _, err := client.CreateIndex(“events”).Do(context.TODO()) ^ | add this You can also check the indices_create_test.go test case in order to see how it’s done. 2 … Read more
You probably put very little effort into figuring this out. Though I am bored so I decided to help you out. Here is your backend: package main import ( “encoding/json” “fmt” “log” “net/http” “time” ) type Response struct { CurrentTime string } func main() { http.Handle(“/”, http.FileServer(http.Dir(“web”))) http.HandleFunc(“/get-time”, func(rw http.ResponseWriter, r *http.Request) { ctime := … Read more
The term keep-alive means different things in the two contexts. The net/http Transport documentation uses the term to refer to persistent connections. A keep-alive or persistent connection is a connection that can be used for more than one HTTP transaction. The Transport.IdleConnTimeout field specifies how long the transport keeps an unused connection in the pool … Read more
I was able to locate where gccgo is asking for so much memory. It’s in the libgo/go/runtime/malloc.go file in the mallocinit function: // If we fail to allocate, try again with a smaller arena. // This is necessary on Android L where we share a process // with ART, which reserves virtual memory aggressively. // … Read more
The select statement chooses a case whose communication op would not block. If there are multiple cases whose comm. op would not block, one is chosen randomly. Since in the example all communication ops would block, and since a default is provided, that will be executed. To “trigger” another case, you have to make sure … Read more
If you need such sequencing, you might reevaluate your need to use goroutines. However, the way you described the solution is correct: go first() { for { <-ch1 // do stuff ch2<-struct{}{} } }() go second() { for { <-ch2 // do stuff ch3<-struct{}{} } }() go third() { for { <-ch3 // do stuff … Read more
Here are some things that the Go program includes that the C program does not include: Container types, such as hash maps and arrays, and their associated functions Memory allocator, with optimizations for multithreaded programs Concurrent garbage collector Types and functions for threading, such as mutexes, condition variables, channels, and threads Debugging tools like stack … Read more