go

does anyone know what that’s about? I am trying to convert an int to a string here. Time type is not equivalent to an int. If your need is a string representation, type Time has a String() method. Sample code below (also available as a runnable Go Playground snippet): package main import ( “fmt” “time” … Read more

I’m not really a professional or know the ins and outs of Go, so take everything I say with some grain of salt. But as I am understanding it, you should most likely use pointers. This is because every time you use a non-pointer type, the whole struct will be part of your struct in … Read more

Your problem is here: //push single code on the block func (s *SmartContract) pushCode(APIstub shim.ChaincodeStubInterface, args []string) sc.Response { hsCode := args[0] lenChk := checkHashLen(hsCode) if lenChk == false { fmt.Println(“Length should be 32”) continue } codeBytes, _ := json.Marshal(hsCode) APIstub.PutState(strconv.FormatInt(makeTimestamp(), 10), codeBytes) return shim.Success(nil) } The error explains what is going wrong. You’re using … Read more

The only other way to remove multiple items is by iterating through the map. This would remove all items, but you can wrap delete in some if to match your pattern: package main import “fmt” func main() { var key string var m = make(map[string]int) m[“x-edge-location”] = 10 m[“x-edge-request-id”] = 20 m[“x-edge-response-result-type”] = 30 m[“x-edge-result-type”] … Read more

You need to put each package in a separate sub-directory. So your directory structure so put lib.go in project/lib and main.go in project/cmd. It should then work. solved How I can use local package in golang? [duplicate]

As mentioned in the comments by Volker you are currently panic’ing when you don’t receive json according to your spec – it’s safe to assume this should not be the case, so do some proper error handling. Nonetheless you’re code is currently working, assuming you have something similar to this struct: type ip struct { … Read more

fmt.Println is a variadic function whose arguments are generic interfaces. Any type can fulfill this interfere, including strings and floats. The second example works for this reason. The first example, however, involves the binary operator +. As https://golang.org/ref/spec#Operators says, binary operators work in identical types. This means you can’t “add” a float to a string … Read more

Here simple example how you can check it: package main import ( “fmt” “time” ) func main() { dateFormat := “2006-01-02” personCreatedAt, err := time.Parse(dateFormat, “2020-01-01”) if err != nil { // error handling… } ok := time.Now().After(personCreatedAt) fmt.Println(ok) } Result will be: true solved How to check if one time.Now is after another time.Time … Read more

Yes, every time you create a channel with make, you get a new channel. If you want multiple goroutines to share a channel instead, you have to create the channel in the parent goroutine and pass it to the child goroutines. solved How does a goroutine behave when it creates a channel [closed]