DenkzeitWiki

Clojure

• Clojure
  • Clojure is a dynamic programming language that targets the Java Virtual Machine.
  • Clojure is a dialect of Lisp, and shares with Lisp the code-as-data philosophy and a powerful macro system. Clojure is predominantly a functional programming language, and features a rich set of immutable, persistent data structures.
    
  
  
• http://clojure.com/
  
  
• http://groups.google.com/group/clojure/files
  • Manual
    
  
  
• http://www.gettingclojure.com/
  • Cookbook
    
  
  
• Clojure Documentation using FreeMind
  
  
• Clojure - Functional Programming for the JVM - a very thorough and good tutorial
  
• http://www.ociweb.com/mark/programming/Clojure.html
  • API
  • Links
• http://www.ociweb.com/mark/clojure/ClojureSlides.pdf
  

Clojure is currently fairly hype-free because there's few reasons outside of the language itself to promote it. It has no marketing people, or large corporations with a vested interest in people using it.[1]

• http://planet.clojure.in/

Clojure. Clojure's got a lot of coolness about it but it's not for everyone.

• http://writingcoding.blogspot.com/2008/06/clojure-series-table-of-contents.html
  • http://writingcoding.blogspot.com/2008/06/setting-up-clojure.html - simply setting up Clojure
    
  
  
• http://netzhansa.blogspot.com/2008/10/trying-clojure.html
  • findings on the way to Clojure
    
  
  
• Clojure: A Lisp Worth Talking About
  • list some interesting features
    
  
  
• Clojure. Wow.
  
  
• Yegge, Clojure, Arc, and Lolita: or Days of Future Past

Yes, mostly-functional languages with software transactional memory is the big new trend. Many new languages are being created based on this, and Rich was far-seeing to do it in Clojure. Yes, it’s primarily because we’ll all be writing more concurrent software to take advantage of all the cores. DanielWeinreb

• Clojure: Challenge your Java assumptions
  
  
• in which new paradigms are explored, clojure is reached, and impressions are still cursory
  
  
• From C# on Mono, to Clojure on the JVM
  
  
• Critiquing Clojure
  
  
• http://danweinreb.org/blog/programming-with-concurrency
• http://measuringmeasures.com/blog/2010/9/13/concurrency-state-and-functional-programming.html
• Zen in Clojure - state, identity, enlightenment
  
  
• TimBray on Clojure
  • http://www.tbray.org/ongoing/When/200x/2009/11/11/Clojure-References
  • http://www.tbray.org/ongoing/When/200x/2009/11/18/Clojure-Parallel-I-O

• http://en.wikipedia.org/wiki/Alfred_North_Whitehead

Talks

• http://patricklogan.blogspot.com/2008/04/my-clojure-talk-at-pdxfunc.html
  • http://groups.google.com/group/pdxfunc/msg/7eda40fcee386e2a
  
  
• http://www.infoq.com/interviews/hickey-clojure
  • not the idea behind OOP is problematic but its implementation
    • mutability is a/the problem even if setting concurrency aside
  • http://www.infoq.com/presentations/Are-We-There-Yet-Rich-Hickey
    • A deconstruction of object-oriented time
    • http://clojure.googlegroups.com/web/AreWeThereYet.pdf
      
  
  
• http://www.chariotsolutions.com/slides/pdfs/ete2009-ClojureAndTheRobotApocalpse.pdf
  
  
• From Concurrency to Parallelism: an illustrated guide to multi-core parallelism in Clojure
  
• Dynamisch, parallel, performant, genial: Clojure von StefanTilkov?
  
• clojure-conj / 2011-slides

interesting features

• java interop
  • http://blog.jayfields.com/2011/12/clojure-java-interop.html
• Concurrency
  • http://clojure.org/concurrent_programming
    • http://clojure.org/agents
  • Clojure could be to Concurrency-Oriented Programming what Java was to OOP
    • most Java programs are so rife with concurrency bugs that they work only 'by accident'
    • Distributed concurrent applications in Clojure?
  • http://clojurestudydc.wordpress.com/2008/12/06/hickey-code-walkthrough/
  
  
• trampoline
  • -> TrampolineStyle
  • TCO -> TailCallOptimization
  • http://lambda-the-ultimate.org/node/3106
• not ObjectOriented
  • use maps where you'd usually use objects
  • Rifle-Oriented Programming with Clojure
    • Any comparison of hot JVM languages is likely to note that "Clojure is not object-oriented." This is true, but it may lead you to the wrong conclusions. It’s a little like saying that a rifle is not arrow-oriented.
• lazy sequences (ClojureSequences)
• consider maps as functions of their keys, and indizes, and sets
• let-bound variables are immutable
• ClojureMacros

Development Environment

• http://enclojure.org/
• Waterfront
• http://code.google.com/p/lighttexteditor/
• Clojure Box
• La Clojure from intellij
• ClojureRepls

HackingClojureWithEmacs

Clojure in Eclipse

• http://code.google.com/p/clojure-dev/
  • clojure-dev is an integrated development environment (IDE) for the ? Clojure programming language, built on the Eclipse platform.
  • Problem installing clojure-dev with Eclipse
  
  
• Using Clojure language to improve Eclipse plugin development

books

• Programming Clojure by Stuart Halloway (via)
  • also as PDF
    
  
  
• Rich Hickey's Clojure Bookshelf @ amazon
  
  
• Practical Clojure
  
  
• The Joy of Clojure
• http://joyofclojure.com/
  
  
• Clojure in Action
  
  
• http://openpdf.com/ebook/clojure-pdf.html
  
  
• Clojure - Einführung und Praxis
  • deutschsprachiges Clojure-Buch, das im September 2010 veröffentlich worden ist.

Quick Set Up

• svn co https://clojure.svn.sourceforge.net/svnroot/clojure clojure
  • call ant on trunk\build.xml
• svn co https://clojure-contrib.svn.sourceforge.net/svnroot/clojure-contrib clojure-contrib
  
• java -cp clojure.jar clojure.main

Discussions

Performance

• Clojure Discussion - When Performance Matters
  • http://groups.google.com/group/clojure/browse_thread/thread/c725eed12f820d99
    
  
  
• What profilers are you using?
  • http://www.yourkit.com/eap/index.jsp
  • http://java.sun.com/javase/6/docs/technotes/tools/share/jvisualvm.html
  • https://visualvm.dev.java.net/
  • http://java.dzone.com/articles/best-kept-secret-jdk-visualvm
    
  
  
• http://blog.higher-order.net/2009/02/01/understanding-clojures-persistentvector-implementation/
  
• http://gnuvince.wordpress.com/2009/05/11/clojure-performance-tips/
• http://jan.rychter.com/enblog/2009/7/20/clojure-performance-tuning.html
  
• http://www.reddit.com/r/programming/comments/8mxji/clojure_performance_tips_wtf/
  
  
• Memory usage in Clojure, hprof
  • JRat the Java Runtime Analysis Toolkit

STM

• Clojure: STMs vs Locks
• Software Transactional Memory
• Azul Systems: Clojure: STMs vs Locks
• http://java.ociweb.com/mark/stm/article.html

Clojure Sucks!

• http://jng.imagine27.com/articles/2009-08-19-011225_clojure_the_false_lisp.html
  • Clojure is not worthy of the Lisp name. It is the antithesis of the Lisp machine in every way. It has little regard for the intellectual rigor and cohesiveness of Lisp.
  • Clojure has inherited many of Java's idioms and problems. Clojure is not only built on top of the JVM. It is also built on the Java language.
  • http://www.reddit.com/r/lisp/comments/9c0g5/clojure_the_zombiereanimated_corpse_of_lisp/

Distributing a Clojure-application

• Distributing application as self contained .jar
• ANSWER: Re: Is it possible to have Eclipse build an executable .jar with Clojure-dev
  
• http://launch4j.sourceforge.net/ - Cross-platform Java executable wrapper
  
• How to create a Clojure application
• http://java.ociweb.com/mark/clojure/article.html#Compiling

Maven

• http://stuartsierra.com/2009/09/04/cutting-edge-clojure-development-with-maven
• http://github.com/talios/clojure-maven-plugin
  
  
• http://pupeno.com/blog/how-to-create-a-clojure-application/
• http://stuartsierra.com/2009/09/03/mavens-not-so-bad

TestDrivenDesign

• http://blog.runcoderun.com/post/145675117/tdd-in-a-functional-language-uncle-bobs-bowling

Transients

• http://www.fatvat.co.uk/2009/08/clojure-transients.html
• http://groups.google.com/group/clojure/browse_thread/thread/cdd62cc47d4ad01d/809b0acc265cee9a?show_docid=809b0acc265cee9a#

Persistent Data Structures

• http://www.infoq.com/presentations/Value-Identity-State-Rich-Hickey
  • http://qconlondon.com/london-2009/file?path=/qcon-london-2009/slides/RichHickey_PersistentDataStructuresAndManagedReferences.pdf
    
  
  
• http://blog.higher-order.net/2009/02/01/understanding-clojures-persistentvector-implementation/
  
  
• http://fupeg.blogspot.com/2009/11/persistent-data-structures.html
  • http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.20.4164
  • http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.21.6279 Ideal Hash Trees
    
  
  
• http://eclipsesource.com/blogs/2009/12/13/persistent-trees-in-git-clojure-and-couchdb-data-structure-convergence/