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🇺🇦 Go for two :)

@golang_for_two

Channel's geo and language: Ukraine, Russian

Category: Technologies

Telegram channel about tricks and engineering practices in the Go programming language over a cup of coffee ☕️.
author: @a_soldatenko
personal blog: https://asoldatenko.org
#golang #go #kubernetes #debugging

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Ukraine, Russian

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Technologies

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🇺🇦 Go for two :)

28 Mar, 10:56

"Programming Is Like S*x: One mistake and you have to support it for the rest of your life." — Michael Sinz

😭😭😭

560 0 13 17

🇺🇦 Go for two :)

16 Mar, 11:58

FYI: https://semgrep.dev/blog/2025/popular-github-action-tj-actionschanged-files-is-compromised/

https://www.stepsecurity.io/blog/harden-runner-detection-tj-actions-changed-files-action-is-compromised

Semgrep | 🚨 Popular GitHub Action tj-actions/changed-files is compromised

Popular GitHub Action tj-actions/changed-files has been compromised with a payload that appears to attempt to dump secrets, impacting thousands of CI pipelines.

943 0 2 3

🇺🇦 Go for two :)

27 Feb, 11:36

After releasing go1.24, we can manage tools as dependencies!

Here is very good step by step article about how to do it https://www.alexedwards.net/blog/how-to-manage-tool-dependencies-in-go-1.24-plus

Also it includes example how to add tools to seperate go.mod file (TIL!)

How to manage tool dependencies in Go 1.24+ - Alex Edwards

1.1k 0 9 12

🇺🇦 Go for two :)

28 Jan, 12:21

it's really sad :(
https://github.com/golangci/golangci-lint/issues/5300#issuecomment-2615552467

🪩 It's time to create a v2 🚀 · Issue #5300 · golangci/golangci-lint

There are at least 6 years since the idea of a v2 is here, we should pass this step now. ImportantThe focus will be on structural configuration changes and default values changes only (and removing...

752 0 5 12

🇺🇦 Go for two :)

25 Sep 2024, 20:58

TIL: strings.Split returns [""] if s does not contain sep and sep is not empty 😅

package main

import (
"fmt"
"strings"
)

func main() {
fmt.Printf("%q\n", strings.Split("", ","))
}

Split returns a slice of length 1 whose only element is s:

[""]

865 1 2 3 3

🇺🇦 Go for two :)

19 Sep 2024, 20:55

Dont forget to share your feedback about developing with Go ✍️

https://go.dev/blog/survey2024-h2

Share your feedback about developing with Go - The Go Programming Language

Help shape the future of Go by sharing your thoughts via the Go Developer Survey

1.2k 1 1 3

🇺🇦 Go for two :)

19 Sep 2024, 13:40

Providing context to cancellations in Go 1.20 with the new context WithCause API

https://josephwoodward.co.uk/2023/01/context-cancellation-cause-with-cancel-cause

and proposal https://github.com/golang/go/issues/51365

Providing context to cancellations in Go 1.20 with the new context WithCause API

1k 1 5 6

🇺🇦 Go for two :)

15 Sep 2024, 17:31

1.5k 1 18 28

🇺🇦 Go for two :)

11 Sep 2024, 10:51

Some pitfalls about generating Kubernetes Custom Resources with `controller-gen` over the years, and how to do more rigid validation and defaulting with it:

https://ahmet.im/blog/crd-generation-pitfalls/

Kubernetes CRD generation pitfalls

A quick code search query reveals at least 7,000 Kubernetes Custom Resource Definitions in the open source corpus,1 most of which are likely generated with controller-gen —a tool that turns Go structs with comments-based markers into Kubernetes CRD...

1.3k 1 4

🇺🇦 Go for two :)

11 Sep 2024, 10:51

Old but still worth to read about why one shouldn;t defer Close() on writable files:

https://www.joeshaw.org/dont-defer-close-on-writable-files/

Don't defer Close() on writable files

It'll bite you some day

1k 1 12 2

🇺🇦 Go for two :)

27 Aug 2024, 21:02

_4chan := make(chan chan chan chan int)

😅😅😅

https://www.dolthub.com/blog/2024-08-23-the-4-chan-go-programmer/

The 4-chan Go programmer

A very silly concurrency exercise in using Go channels that send channels that send channels that send channels.

1.3k 1 13 26

🇺🇦 Go for two :)

22 Aug 2024, 12:21

What do you think if I start posting not only about Golang, but some related topics like k8s/containers?

Poll

Yes
No
Strong Yes
i don't care

238 votes

1.4k 1 0 1 9

🇺🇦 Go for two :)

20 Aug 2024, 14:22

For all GO haters :) https://juli1.substack.com/p/why-i-fell-in-love-with-go

Nice quote and summary:
>Technologies like JavaScript or Go are like a good burger: it’s an option that the majority understand and choose regularly. It may not be the most elegant option, but it does the job and allows us to focus on problems that matter.

Why I fell in love with Go

When I was still young in my career, I was obsessed with niche-languages mentioned in big stories on Hackernews.

1.2k 1 14 2 9

🇺🇦 Go for two :)

14 Aug 2024, 11:09

https://tip.golang.org/doc/go1.23#iterators uhhhh 🙃🙃🙃🙃

Go 1.23 Release Notes - The Go Programming Language

1.3k 1 3 2 8

🇺🇦 Go for two :)

19 Jun 2024, 12:13

How do you track code coverage for OSS projects?

codecov seems very flaky, (will provide some details in thread)

wdyt about https://github.com/vladopajic/go-test-coverage?tab=readme-ov-file

GitHub - vladopajic/go-test-coverage: go-test-coverage is tool and github action which reports issues when test coverage is below set threshold

go-test-coverage is tool and github action which reports issues when test coverage is below set threshold - GitHub - vladopajic/go-test-coverage: go-test-coverage is tool and github action which r...

1.7k 1 5 1 1

🇺🇦 Go for two :)

22 May 2024, 17:43

TIL: a % 128 = 0 is the same as a & 127 = 0

'Which is a faster operation since it just requires doing the AND and not the whole division and remainder comparison' @jesusvazquezp

from https://github.com/prometheus/prometheus/pull/14118#pullrequestreview-2068077407

Check context every 128 labels instead of 100 by colega · Pull Request #14118 · prometheus/prometheus

Follow up on #14096 As promised, I bring a benchmark, which shows a very small improvement if context is checked every 128 iterations of label instead of every 100. It's much easier for a compu...

1.8k 1 8 1 5

🇺🇦 Go for two :)

16 May 2024, 11:41

proposal: reflect: add TypeAssert likely accepted 🎉 ')

https://github.com/golang/go/issues/62121

proposal: reflect: add TypeAssert · Issue #62121 · golang/go

Consider the following benchmark: func Benchmark(b *testing.B) { v := reflect.ValueOf(new(time.Time)).Elem() b.ReportAllocs() for i := 0; i < b.N; i++ { _ = v.Interface().(time.Time) } } This cu...

1.8k 1 2 7

🇺🇦 Go for two :)

7 Feb 2024, 19:58

Collections what's new in Go 1.22:

- slices.Concat https://blog.carlana.net/post/2024/golang-slices-concat/
- reflect.TypeFor https://blog.carlana.net/post/2024/golang-reflect-type-for/
- https://pkg.go.dev/cmp#Or
- https://pkg.go.dev/net/http@master#FileServerFS
- https://pkg.go.dev/database/sql#Null

2.4k 1 9 1 9

🇺🇦 Go for two :)

30 Jan 2024, 17:24

https://blog.carlana.net/post/2024/golang-slices-concat/

What’s New in Go 1.22: slices.Concat

We’re up to the second release candidate for Go 1.22, which should be released quite soon. In my last blog post, I wrote about my work on reflect.TypeFor for Go 1.22. This time, I’ll be writing about how I proposed and implemented slices.Concat.

2.4k 1 2 2 3

🇺🇦 Go for two :)

25 Jan 2024, 17:57

Forward from: Go performance channel

Hiring Challenge: Smallest #golang Websocket Client

https://dyte.io/blog/hiring-challenge-smallest-golang-websocket-client/ by @dyte_io

Hiring Challenge: Smallest golang Websocket Client

Learn to create a compact Go program for a websocket server, optimizing the binary size. Insights from a Dyte hiring challenge.

1.8k 0 12 5

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