Clojure Gazette 1.19
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Issue 1.19 - August 24, 2012
Declarative programming means telling the computer what instead of how. SQL is declarative: you say what data you want. It is up to the database to figure out how to give it to you.
Declarative programming is having a slight resurgence at the moment. Clojure is feeling it, and I thought I'd tap into it that for this issue.
**Eric Normand **
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core.logic is a Prolog-style logic language embedded in Clojure. It isshaking things up. I've referred to core.logic before, but I repeat it because it is the perfect example of declarative programming in Clojure.
turing tar pit
A great paper that analyzes common sources of complexity in softwareand traditional approaches to managing that complexity. It ends with awide-eyed proposal for dealing with complexity by focusing ondeclarative programming.
The Future is Parallel, and the Future of Parallel is Declarative
A somewhat different take on declarative programming: functional programming_is_ declarative. I mostly disagree with this. I think in general functional degrades into a strict form of procedural programming. But it is good to see another perspective.
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Stuart Halloway gives a similar talk to a previous talk about makingcode evident, that is making it say what it does. He goes into Datomica bit, as an example.
David Nolen, Pattern Matching & Predicate Dispatch
David Nolen goes through some core.logic code in New York.
Datalog was a part of clojure-contrib, but it is no longer beingmaintained. Would someone like to take it?
finally, a good explanation
I have not seen a better introduction to core.logic.