go

[Solved] Parse stringified JSON

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[ad_1] do it in two steps. package main import ( “encoding/json” “fmt” ) func main() { type AutoGenerated struct { Messages string `json:”messages”` AppCart string `json:”app_cart”` Addcartrows string `json:”addcartrows”` MinicartContent string `json:”minicart_content”` CartQty string `json:”cart_qty”` AddedProductJSON string `json:”added_product_json”` } type addedProduct struct { ID string `json:”id”` Size string `json:”size”` } type productRow struct { ProductID … Read more

[Solved] How to find if type is float64 [closed]

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[ad_1] You know that myvar is a float64 because the variable is declared with the concrete type float64. If myvar is an interface type, then you can use a type assertion to determine if the concrete value is some type. var myvar interface{} = 12.34 if _, ok := myvar.(float64); ok { fmt.Println(“Type is float64.”) … Read more

[Solved] How do I translate this Java interface & inheritence structure to Golang? [closed]

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[ad_1] I figured out how to achieve the same thing by myself, even though I enjoyed the “Just learn Go” answers I got. It’s solved by creating a wrapper function userLoggedInWebEntry that takes in a WebEntryUserLoggedIn function signature, but returns a WebEntry function signature. It achieves the same thing as the Java inheritance code above, … Read more

[Solved] Cannot convert time.Now() to a string

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[ad_1] 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” … Read more

[Solved] How to convert byte type value to int type value

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[ad_1] You can use the following approach For Example package main import ( “fmt” “strconv” ) func main() { str := []byte(“0125”) aByteToInt, _ := strconv.Atoi(string(str)) fmt.Println(aByteToInt) } You can run following code here https://play.golang.org/p/iq8Q9PkhM43 [ad_2] solved How to convert byte type value to int type value

[Solved] Go Error: continue is not in a loop

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[ad_1] 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 … Read more

[Solved] Html template use on golang

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[ad_1] You could send variables in map. For example: package main import ( “bytes” “fmt” “text/template” ) func main() { t, _ := template.New(“hi”).Parse(“Hi {{.name}}”) var doc bytes.Buffer t.Execute(&doc, map[string]string{“name”: “Peter”}) fmt.Println(doc.String()) //Hi Peter } [ad_2] solved Html template use on golang

[Solved] How to remove multiple items from map [closed]

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[ad_1] 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 … Read more

[Solved] http: panic serving 127.0.0.1:48286: EOF [closed]

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[ad_1] 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

[Solved] Why use the + sign in printfl?

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[ad_1] 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 … Read more

[Solved] How to check if one time.Now is after another time.Time [closed]

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[ad_1] 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 [ad_2] solved How to check if one time.Now is after … Read more

[Solved] How does a goroutine behave when it creates a channel [closed]

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[ad_1] 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. [ad_2] solved How does a goroutine behave when it creates a channel [closed]