I have the following program (simplified as much as possible): package main import "fmt" type Test struct { Str *string } func main() { arr := []string{"vanC", "vanD"} arr2 := make([]Test, 0) for _, element := range arr { fmt.Println(element, &element) arr2 = append(arr2, Test{ Str: &element, }) } fn(arr2) } func fn(arr2 []Test) {… Read More Passing pointer of string to a function leads to the wrong string being printed

I’ve defined the following struct in Go: type repoStars struct { name string owner string stars int } And I’ve created an array repoItems := []repoStars{} which has multiple items of the struct above. This is how repoItems looks like: I’m trying to return those items as a JSON response: w.Header().Set("Content-Type", "application/json") json.NewEncoder(w).Encode(repoItems) And it… Read More Go return struct as JSON in HTTP request

I’m studying Golang and I stopped by this and puzzled me. package main import "fmt" func main() { month := […]string{1: "Jan", 2: "Fab", 3: "March", 4: "April", 5: "May", 6: "June", 7: "July", 8: "Aug", 9: "Sep", 10: "Oct", 11: "Nov", 12: "Dec"} fmt.Println(cap(month)) summer := month[6:9] Q2 := month[4:7] fmt.Println(cap(Q2)) fmt.Println(len(Q2)) fmt.Println(cap(summer)) fmt.Println(len(summer))… Read More Slices return unexpected length

Does any one know if in Go I we have something like is ? I need to understand if a var. is map or interface. In Python I can do smt like this: map = list() print(map is list()) if map is list(): # do something In Go I tried to do the same: var… Read More How to check if var is map, slice or interface?

I’m new to Go and I try to build a Json-builder functionality to practice. My aim is to create a recursive library to build json. This is the warning I get for the "second" field. Unexpected newline in composite literal and here’s my attempt. I don’t see a mistake here: package main import ( "fmt"… Read More Unexpected newline in composite literal for a map[string]any

I’m kinda stuck exploring Docker features in order to create simple container with some Go utilities installed. I need to create image that has gosec and govulncheck utilities installed so I can run them on code in container. My petty attempt produced the following: # syntax=docker/dockerfile:1 FROM golang:1.19-alpine WORKDIR /app ENV GO111MODULE=on # copying my… Read More How to create simple Docker container with Go utilities installed

I have a bunch of JSON files that I need to Unmarshal. They have basically the same format, but different "length" one example https://pastebin.com/htt6k658 another example https://pastebin.com/NR1Z08f4 I have tried several methods, like building structs like type TagType struct { ID int `json:"id"` Name string `json:"name"` Slug string `json:"slug"` tags []Tag `json:"tags"` } type Tag… Read More Unmarshal a dynamic json

I am trying to print a Golang struct as a string with escape characters, but not able to do that. I want to print my struct like this: "{\"data\":\"MyName\",\"value\":\"Ashutosh\"}" Here is what I have tried. package main import ( "encoding/json" "fmt" ) type Resp struct { Data string `json:"data"` Value string `json:"value"` } func main()… Read More How to print struct as a plain string with escape characters in golang?

I have this function that listens to RabbitMQ to consume a message. And at some point, I want to stop listening and close the channel and quit the function. func WaitForConfirm(expectedLen int){ count := 0 forever := make(chan bool) go func() { for i := 0; i < 5; i++ { count++ if count ==… Read More How to exit a function with infinite loop of channel