You’re doing all the processing in the background, but you’re still waiting for it to finish. The solution would be to just not wait. The best solution would move all of the handling elsewhere to a function you can just call with go to run it in the background, but the simplest solution leaving it … Read more
This code will works package main import ( “bytes” “encoding/json” “fmt” “log” “strings” ) type Item struct { Id int `json:”id”` Category string `json:”category”` Name string `json:”name”` Description string `json:”description”` } type Items []Item var myJson = []byte(`[{ “id”:1, “category”:”fruits”, “name”:”Apple”, “description”:”Apple is my favorite fruit.” }, { “id”:2, “category”:”colors”, “name”:”Red”, “description”:”Red color is always … Read more
Program execution: When the function main returns, the program exits. It does not wait for other (non-main) goroutines to complete. 1- main is goroutine too, you need to wait for other goroutines to finish, and you may use time.Sleep(5 * time.Second) for 5 Seconds wait, try it on The Go Playground: package main import ( … Read more
You have to set the Content-Type header in the response correctly. Without the content type, most browsers will not execute the css. Something like the following should work, but this is essentially just a sketch: http.HandleFunc(“/static/”,func(wr http.ResponseWriter,req *http.Request) { // Determine mime type based on the URL if req.URL.Path.HasSuffix(“.css”) { wr.Header().Set(“Content-Type”,”text/css”) } http.StripPrefix(“/static/”, fs)).ServeHTTP(wr,req) }) … Read more
As the error says, your use of ,string is invalid for your JSON input. Remove it: Name string `json:”name,omitempty”` ,string can be valid in a JSON tag, and it indicates that the number should be marshaled as a string literal. In the case of a value which is already a string, that means it expects … Read more
I haven’t analyzed all of it, but definitely the modification of mapStore from multiple goroutines is unsafe: mapStore[*res.someData] = append(mapStore[*res.someData], res) But as a starting point, run this under the race detector. It’ll find many problems for you. This is also clearly unsafe: resSlice := append(resSlice, res) But it also doesn’t quite do what you … Read more
There are several issues in your code. First of all, all the fields of your edit struct must be exported which means you should capitalize the first letter of every fields. Just like the following: type edit struct { Id Values } The data type of of key of the Values field must be string … Read more
So the crash is caused by the db pointer being nil. This means code which tries to use that connection on line 40 causes a panic. rows, errrows := db.Query(… The db pointer is nil because, as Peter pointed out, http.ListenAndServe is blocking, which means nothing after it will run. Try running this example locally … Read more
Yes, it is possible. You can use plot.Align: package main import ( “math/rand” “os” “gonum.org/v1/plot” “gonum.org/v1/plot/plotter” “gonum.org/v1/plot/vg” “gonum.org/v1/plot/vg/draw” “gonum.org/v1/plot/vg/vgimg” ) func main() { rand.Seed(int64(0)) const rows, cols = 2, 1 plots := make([][]*plot.Plot, rows) for j := 0; j < rows; j++ { plots[j] = make([]*plot.Plot, cols) for i := 0; i < cols; i++ … Read more
40000/3 is an integer value. It is then converted to a float. To perform float division use float values. 40000.0/3 will result in a float value. 3 solved float64 not showing decimal points [duplicate]
You must provide only 1 package within single folder. Consider to name package like the folder. In your case create folder “utils” and move your helper.go in there. Please, don’t forget to name public types, vars and funcs properly: start their names with uppercase symbol: Finally your project would look like this: Your helper.go would … Read more
go path is not set. find installed directory of go lang. (e.g linux ) whereis go then export below var. export GOPATH=$HOME/go export PATH=$PATH:$GOPATH/bin these exported variable scope is limited to current terminal only so better to set into file ~/.bashrc solved Error when i running the application hyperledger fabric
To understand what is happening under the hood you must understand the pointer and value semantics of for range construct in go. It is clearly explained in this ardan labs article emails := []string{“a”, “b”} CCEmails := []*string{} for _, cc := range emails { p := &cc fmt.Println(cc, p) CCEmails = append(CCEmails,&cc) } The … Read more
Finally figured the answer… The problem was that I needed to close my monitoringChan in the first goroutine and then monitor (Defer wg.close()) in the second goroutine. Worked great when I did that! https://play.golang.org/p/fEaZXiWCLt- solved Goroutine loop not completing
Times in BSON are represented as UTC milliseconds since the Unix epoch (spec). Time values in Go have nanosecond precision. To round trip time.Time values through BSON marshalling, use times truncated to milliseconds since the Unix epoch: func truncate(t time.Time) time.Time { return time.Unix(0, t.UnixNano()/1e6*1e6) } … u := user{ Username: “test_bson_username”, Password: “1234”, UserAccessibility: … Read more