refactor: Refactor Reduce operation.

[drupol]

BREAKING CHANGE: yes

This PR:

• Fix Reduction operations should return a single value #256
• It breaks backward compatibility
• Is covered by unit tests
• Has static analysis tests (psalm, phpstan)
• Has documentation
• Is an experimental thing

DONE 🟢

• first
• foldLeft
• foldLeft1
• foldRight
• foldRight1
• implode
• reduce
• unlines
• unwords
• last
• head
• get
• compare
• min
• max

[drupol]

I think I'm done with this PR, let's leave it open a little bit to carefully check if this is the proper thing to do.

I know the pace is a bit different during holidays, so, it might take a little while before it gets merged.

[AlexandruGG]

I now leave this PR to you @AlexandruGG , good work !

Thanks! I added the remaining operations and updated a couple bits of documentation that were still mentioning current.

I'll give this another fresh look tomorrow, see if I can spot anything else needed.

[drupol]

Thanks! I added the remaining operations and updated a couple bits of documentation that were still mentioning current.

Indeed, nice. I was planning to do it after all the commits were done, but you did it. Thanks :)

I'll give this another fresh look tomorrow, see if I can spot anything else needed.

Ok will do that ! Cheers!

[AlexandruGG]

@drupol I went through this again and added a few more things. Please feel free to comb through the docs yourself as well and see if you can spot any bits we might have missed

[AlexandruGG]

Thank you for working on this! 💯

[drupol]

This is super great !!!

I propose to merge this, then do remaining changes if any in another branch.

We've been waiting for too long for this :)