Category "go"

is there a Generic way to assert type? [duplicate]

I have found myself writing the same function X number of times to get different types of Items out of my go-cache. The duplicate functions ar

Regex for 16 hex char string that contains at least one letter

I want to write regex to recgonize a hex string with length of 16 bytes, for example: 1a2b3c4d1a2b3c4d The following answers is NOT correct: [0-9a-fA-F]{16} b

Regex for 16 hex char string that contains at least one letter

I want to write regex to recgonize a hex string with length of 16 bytes, for example: 1a2b3c4d1a2b3c4d The following answers is NOT correct: [0-9a-fA-F]{16} b

Sum of two float64 variables in go [duplicate]

Could somebody explain me next rows: var a, b = 2.0000001, 3.00000 fmt.Println(a + b) fmt.Println(2.0000001 + 3.00000) results of prints: fir

How to check if a Go program isn't running via the go run command?

I want to know if there is a non OS-specific way to test if a Go program is launched by using the go run command or by executing the binary produced by the go b

How do I mimic `git --work-tree ...` with `go-git` in go?

I have a bare repository in which I need to add and commit a set of files. As far as I understand it, adding files to the index requires a worktree. Using git o

Prometheus counters: How to get current value with golang client?

I am using counters to count the number of requests. Is there any way to get current value of a prometheus counter? My aim is to reuse existing counter without

Building Go apps with private gitlab modules in Docker

I am trying to build my go apps on a docker file. Inside my go.mod there is private package that needs authentication/ssh. This question is similar to Building

MongoDB - Group by inner element

I am explaining with a simple example see my MongoDB collection looks like this: [ { pid: erwer, qty: 3, LevelDetails: {

Gorm Update and Get the Updated Rows in a single operation?

Is there any way to get the rows that have been updated using the update command in Gorm, using a single operation.

Unable to read "request.Body" in Go Chi router [duplicate]

Consider the following code in main/entry function r := chi.NewRouter() r.Use(middleware.RequestID) r.Use(middleware.RealIP) r

How to get in OpenTelemetry otelgin middleware the traceid or full context to provide it to grpc clients?

Atm, I work on a bunch of distributed microservices in go which I want to trace. I have an "api-gateway" that works via REST and then calls the needed microserv

Go boltDB query using bolthold 3 conditions

So I had this question before and I had an answer below the question which worked, but I just realized that the query I came out with does not work as planned.

How to exclude coordinates which overflow matrix

The task is to write a function that returns all its neighbors for an element. Diagonal elements are not considered neighbors. In general, the problem is solved

Printing strings and characters as hexadecimal in Go

Why cyrillic strings in hexadecimal format differ from cyrillic chars in hexadecimal format? str := "Э" fmt.Printf("%x\n", str) //result d0ad str :

Reading a Config File in Android from a Golang Bind Service

I have a Golang program from which I have created a package using gomobile bind. It creates two files abcd.jar and abcd.aar. I have copied these 2 files to the

Unit Testing for pgxpool

I am looking to write unit tests for Go code that uses pgxpool to interact with a postgres database. Is there a test framework that will stand up a dummy or moc

Does copy() function more efficient than slice[start:end] operators? [duplicate]

My goal is to validate whether the tutorial given by w3schools is true, I use w3schools#Memory Efficinecy as reference. I quote from the tutor

AWS Route53 - Adding Simple Record

I am able to add "Weighted" A records for the AWS Route53 using the API, using [Weight: aws.Int64(weight)], it works great using the code below. But how

Error message "go: go.mod file not found in current directory or any parent directory; see 'go help modules'"

I just updated to the new version of Go - Go version 1.16.2 Linux/amd64 and am getting an error when I build a Hello, World! example: go: go.mod file not found