Updating the Content for New Go 1.21 Features

[ab7z]

I wanted to bring to your attention the recent release of Go version 1.21 and the exciting new features it brings to the language. I believe it would greatly benefit the Go community if the website is updated to include explanations and examples of these new features.

[eliben]

Yes, indeed, this is planned.

Ideas and PRs will be appreciated

[eliben]

https://github.com/mmcgrana/gobyexample/commit/2166e61181f712d4a7c8a29b019fe7d122ffc8a3 and https://github.com/mmcgrana/gobyexample/commit/655a3b6a9e216972337ccab5c124142d2ad71a83 update the sorting samples to use new functionality from the slices package

[eliben]

Here's a list of ideas of the updates needed, with marking of stuff done:

• [x] clear for slices
• [x] Update usage of sorting from sort to slices
• [x] More examples of slices package utils
• [x] Examples of maps package utils

Other topics I'm much less sure about:

• slog: we don't even cover non-structured logging now. A potential example could be interesting but the devil is in the details
• clear for map is too specialized to mention here, IMHO
• Maybe min and max? OTOH they're too trivial and there's no natural place to mention them

[eliben]

slices and maps examples added in https://github.com/mmcgrana/gobyexample/commit/146bd9cce2d3d89fac28f4f6334d9b2acbed7dee

[eliben]

log/slog (and log itself) added in https://github.com/mmcgrana/gobyexample/commit/15d8fe75b82f488461a0bb219e555bfccb999b08