Golang 1.21: What is new?
What is new in Golang 1.21? Compared to the 1.20 release, the Go team added new built-in functions to the language and new standard library packages. There are a lot of features, but there are seven I want to call out:
■ New “log/slog” package
■ Toolchain support
■ “go:debug” directive
■ New “min”, “max” and “clear” built-in functions
■ New “slices” package
■ New “maps” package
■ New functions in “context” package
■ Examples: https://github.com/MarioCarrion/videos/tree/609b7c26ef6e53738fa10cf9db25e3c3c4ac470b/2023/go-1-21-0
■ Learning Golang: Context package: Cancellations, Deadlines and Request-scoped values: https://youtu.be/mgJMIZsWfB4
== Installing
■ https://go.dev/dl/#go1.21
■ https://go.dev/doc/go1.21
■ All API changes: https://github.com/golang/go/issues/57126
■ “go install”: https://x.com/golang/status/1688934360731332608?s=20
■ MacOS Homebrew: brew upgrade go
== All Go/Golang Playlists
■ Software Architecture in Go/Golang: https://www.youtube.com/playlist?list=PL7yAAGMOat_GCd12Lrv_evJ3Zhv1dl8B-
■ Building Microservices in Go/Golang: https://www.youtube.com/playlist?list=PL7yAAGMOat_Fn8sAXIk0WyBfK_sT1pohu
■ Go/Golang Tools and Packages: https://www.youtube.com/playlist?list=PL7yAAGMOat_HEEOvH99agDs_5g51A0Ls3
■ Learning Concurrency Patterns in Go/Golang: https://www.youtube.com/playlist?list=PL7yAAGMOat_Fhj_px_DzNzTsXs-mRwv1t
■ Learning Go/Golang : https://www.youtube.com/playlist?list=PL7yAAGMOat_F7bOImcjx4ZnCtfyNEqzCy
■ Learning Relational Databases in Go/Golang: https://www.youtube.com/playlist?list=PL7yAAGMOat_EgwoQTvNUflrYL_4qzdB7f
■ Testing in Go/Golang: https://www.youtube.com/playlist?list=PL7yAAGMOat_HSeW4zF0uRL9EaHadE4ZZq
00:00 – Intro Golang 1.21
00:10 – How to install
00:42 – New “log/slog” package
00:58 – Toolchain support
01:38 – “go:debug” directive
03:35 – New “min”, “max” and “clear” built-in functions
05:05 – New “slices” package
06:12 – New “maps” package
07:19 – New functions in “context” package
11:14 – Conclusion
=== Who am I?
Hello 👋🏼! My name is Mario, and I am a Hands-on Software Architect and Lead Backend Engineer with decades of professional experience building all kinds of software, such as on-premise Automation Systems, Linux Accessibility Desktop Applications, Cloud Governance and Compliance Systems, and Distributed Cloud-based Advertising Systems.
The content I produce includes what I’ve learned while working for small startups and large companies and the processes I’ve followed for successfully delivering complex enterprise systems from start to end.
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