Chapter Idea: Practical uses for core.logic

[clojure-cookbook]

Chapter Idea: Practical uses for core.logic

[avescodes]

That's a good idea! There isn't any reason we wouldn't include a chapter or number of recipes on this. Lets see if we can brainstorm and come up with a list of 10-20 problems we could solve.

Do you have any initial recipes in mind?

[belucid]

I'd love to work on some recipes for core.logic. What chapter do you think they'd fit into. Looking at the chapter list, nothing jumped out at me.

[lenaschoenburg]

I'm not sure but can't you query datomic with core.logic? That seems very practical and fits to the book as there's already a datomic chapter.

[lenaschoenburg]

The longer I think about it the more necessarily it seems. Most people I told about core.logic reacted with "Great, you can solve the zebra puzzle and sudoku but how can I use it in my app?". This chapter could be an inspiration!

[avescodes]

@belucid I don't have a particular chapter in mind right now. It really depends on what kind of problems people are solving with core.logic. The chapter list itself is rather flexible so Luke and I are free to adjust it to suit the recipes we have in hand.

[hypirion]

I think I found a suitable and practical core.logic problem which is also relatively small:

You have a list of meetings and the time schedule for each person on that list. By using core.logic, find a way to optimally place the meetings such that every person can attend all their meetings (if possible). For simplicity, every time slot can be considered as one hour.

A very naive solution could be implemented like this: https://gist.github.com/hyPiRion/5793788

There are more efficient ways to do this (this can be represented as a constraint satisfaction problem), so it should be done that way instead. The amount of code should be about the same (or perhaps a bit shorter).

(==any was to my knowledge implemented by @fredericksgary.)

Edit: I'd like to say that explaining core.logic-stuff would mean that a lot of things has to be explained if no prerequisites are assumed. So I think it's a good idea to have some prerequisites or find a person well-versed with words for those explanations.

[avescodes]

@senior is working on this as part of our pre-release process, closing this.