Questions tagged [go]
Go, commonly referred to as "golang", is a fast, statically typed, compiled language created by Google. The language was initially developed as an alternative to C++ for server infrastructure and has native support for concurrency.
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Go log file swapper
Please review my code. I left some comments where I think something might be wrong, but any comment is appreciated.
I am writing a package for a project I am currently building. Its purpose is simply ...
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Gracefully shutdown http.Server{}
Good day, everyone!
I want to learn the proper way to gracefully shutdown a http.Server{}. Some answers I found would not handle ...
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golang HTTP client that follows pagination header
I'm new to Go from another language and I'm most interested to know if this implementation has anything that's not idiomatic Go, but any feedback is welcome and you're not going to hurt my feelings by ...
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Tiny portion of Git wire protocol implemented in Go
I wanted to upgrade a remote reference in a remote git repository (without a local checkout) much like ssh git update-ref but gitlab doesn't allow me running that. So I wrote this little Go utility ...
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Aggregate transactions in slips
I wrote code to aggregate transactions in slips. I'm concerned with the performance of my code because it uses 3 loops that are nested so the time complexity will be cubic. This code won't scale well ...
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I have use this approch in my golang mongo REST APIs' DAO layer, need to clarify this is a good way or not
I have used this approach in my Golang MongoDB REST APIs' DAO layer, I need to clarify whether this is a good way or not, code is as follows,
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Idiomatic retry loop in Go
I recently started taking on the Gossip Glomers distributed systems challanges as a way for me to practice writing Go and learn something new. In order to solve one of the challenges, I had a request ...
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Gorilla/mux request DTO builder
I got tired of having to extract the provided input from the requests manually so I made a library with which I can extract the values from the request a build a given DTO. The idea is to create ...
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For loop vs If statement using conditional variable
I'm extending the sync.Pool type by limiting the amount of objects that can reside outside the pool. To achieve this I'm using ...
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Golang code that gets data from Kubernetes API and Writes to Spanner
Code for writing a Writer that is used to dump data in a Spanner table.
Specifically concerned about the function: ...
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CLI app to spin up a Docker cluster
This is my first Go project. I've written a CLI app to provision a database cluster on docker containers. Since it's a distributed database, you can configure per-node services. For example: to ...
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Golang: package setup to orchestrate initialization
The following code implements a package, which can be used to execute functions in the correct order based on dependencies.
Example:
...
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Testing Receiver Methods in Golang
I'm trying to test and implement an exercise on receiver method from here.
This basically states the following:
Cars start with full (100%) batteries
Each time you drive a car, it covers the it's ...
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Write a library for Mutex protected variables in Go
Problem description
I'm trying to write a library for protecting variables from concurrent access using sync.RWMutex. The goal is to prevent accidental misuse and promote best practices and I didn't ...
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Implementation of a lock free queue using CompareAndSwap in Go
Here is my implementation of a lock free queue using CompareAndSwap operation.
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Determining if a file is UTF-8 text by looking at its first n bytes
I'm trying to find out whether a particular file is UTF-8 encoded readable text, by which I mean printable symbols, whitespaces, \n, ...
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A producer (mapper) and consumer (reducer) problem with concurrency in go with race conditions
Link to go playground https://go.dev/play/p/ctQDpDW6pui
This code has been based on suggestions and conversations in this thread here
Architecture:
A read method creates a channel shared with ...
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Golang waiter implementation pattern
I'm working on a simple waiter implementation, waiter - is a code that polls an external API until a desired response is received within a given period of time. I would like to keep it simple, but at ...
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Remove unwanted chars from CSV header as it's being read
In trying to answer this question on StackOverflow about using the gocarina/gocsv package to read a CSV with a header column name that has a comma, I got to thinking about how to preprocess the first ...
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Parsing shortcodes out of a string
I wrote this shortcode parsing and it runs in \$O(N^2)\$. Is there a way to better optimize this?
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Capture stdout output of a function call
Are there any major flaws to implement this test helper function?
I know that the preferred way (refactoring) would simply make the function to be tested return its value and delegate printing to ...
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Readlines abstraction for Golang
I've just started learning Golang and was solving some problems which required me to read lines of text from a file. I decided to abstract away the reading part so that I can use Go's ...
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Distributed lock service implementation in Golang
I have multiple E2E tests (written in Java) which share login details, each test during runtime will query the locker API for login details which is running on its own dedicated server.
Below is my ...
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Component-wise double precision multiplication in Go
I'm working on porting the bullet3 physics engine to Go to learn more about physics simulations. I'm working through some of the convex hull computing code, and I've reached a component-wise, double ...
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Golang HTTPS certificate expiry checking CLI tool (UPDATED)
I previously submitted this CLI tool to this site for review and have made changes based on comments by the reviewer. I have refactored the code, fixed a bug (the tool will no longer output ...
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Count occurrence of elements in map during creation
This code works, but it's so ugly, so I was hesitant to put it on display.
There must be a nicer/easier way to achieve this.
The main issue is to count each unique occurrence during runtime when the ...
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Golang HTTPS certificate expiry checking CLI tool
I am a beginner at using Golang, I would like advice about the following program. It is a CLI tool that can check the expiration dates of HTTPS certificates concurrently. I have only used the standard ...
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Integer hash function for concurrent map implementation golang
I am using concurrent map from this repo which only uses string as the key and it doesn't have any implementation for key as integer (int64) so I tried implementing it by just replacing all ...
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Dining Philosophers in golang
I'd appreciate any feedback on this code. The assignment was to have each philosopher eat three times. I introduced time into the problem where eating takes 20 minutes and then the philosopher ...
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Timeout middleware in Gin -Golang
This is an implementation of a custom timeout middleware.
I am creating a context with a deadline in my middleware and using it in the rest handlers for timeouts (to wrap the query to DB eventually) ...
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A Go endpoint to get all items from DynamoDB and return them as a JSON response
Let me start by stating that I am currently in the process of learning Go and AWS CDK. What better way to learn than building a Serverless Todo API!? Using the Go AWS CDK (v2) I have built my ...
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Golang Program to convert RGB and Hex to DMC colors
I wrote a small console app for converting RGB or Hex values (by specfying on top of the input file) to the nearest colour of DMC thread. I'm curious to know how I could improve my code organisation ...
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Launching two goroutines in parallel and returning result of the first finished
Real case: I need to retrieve data from a web service (main process), but in case that web service is taking too long, I retrieve the data from the cache (that data might be older) in a parallel ...
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Simple goroutines to make multiple http calls
I have a program which calls a lot of URLs with the help of a goroutine and assigns the result to a mapping. As a beginner in go I chose the simplest implementation as possible. I have ended up ...
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Golang implementation of dining philosophers variant
I would like to implement a variant of the classical dining philosophers problem which has the definition as:
Implement the dining philosopher’s problem with the following constraints/modifications.
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Finding files using multiple coroutines
I'm trying to write a simple program to find a certain file name within a directory tree. I use up to 30 coroutines.
Is there anything wrong with this code or what needs to be improved?
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Set up pub/sub service as part of web app in Go
I have a web application that I'm writing in Go, using the Iris package. This app needs to listen to Azure Service Bus for messages, and take action when they come in. This is my first time writing ...
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caesar cipher decoder and encoder - go
I implemented my first algorithm in golang - the caesar cipher. Is there something i could do more efficiently? I am quite new to go and any improvement suggestions are welcome.
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A fast food ordering cli program
i am a student learning go as my first programming language as a hobby. I have tested this program on linux+kitty terminal. Program needs unicode supported terminal.
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Change interface depending on if statement
I'm using fiber and mongodb. Field "field" is needed to obtain certain data to unload the load on the database. If field "field" is empty, then needs to output all the data from ...
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How to avoid nested map allocations in below code?
I have a below struct where I have a nested map for CustomersIndex which allocates bunch of internal maps causing memory increase. I profiled it so I noticed this. ...
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go mars rover kata go
A kata is an exercise. In martial art is form. In software development is a way to practicing. For example in TDD.
Mars rover kata aims to solve some problem in the context of the mars rover. Here you ...
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The levers puzzle
I started playing Pathfinder: Kingmaker, and very soon ended up in a room with 6 levers, and a task to open a secret door by manipulating the levers. I assumed that the correct position for all the ...
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Networking code for a Golang P2P library
I am working in a Noise-based P2P lib that has only basic TCP networking implemented so far. I am looking for anyone who get interested in this project that want to helps with reviews to the code and ...
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Go Routine: Multiple Consumers to RabbitMQ
Here I'm trying to create the multiple consumers of rabbitmq queue using the goroutines. Also, I'm trying to achieve a graceful shutdown. Is the following approach create any memory leaks? or is it ...
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Golang function that reads S3 files and populates maps with strings as keys
I have a below read function which is called by multiple go routines to read s3 files and it populates two concurrent map as ...
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Managing TimeMachinesCorp POE clock via UDP
I've got a working implementation of a go program to talk UDP to
TimeMachinesCorp POE clocks.
This code is also in a github repo which notes things I know aren't implemented yet. I feel like there's ...
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MongoDB abstraction in Go with generics
I'm working on a new project with go. So I figured I would give this new feature a run (it's fun!). Although, I'm not sure I'm implementing this the way it's suposed to be.
I've read the following ...
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Golang solution to CTCI 1.2: Check whether two strings are permutations of each other
Just started learning Go recently. Did some questions from Cracking the Coding Interview book. Wrote the solutions in Go. Let me know what you think.
https://github.com/samjingwen/ctci
Below is ...
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Suggestions for improvement for generic array and map functions in Go 1.18
Yesterday I build some generic functions for the new official Golang 1.18 release. What do you think about it and what could be added and improved?
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