Don't fear the paren! 8 reasons you should give Clojure a try

( ) DON’T FEAR THE PAREN! 8 reason you should
give Clojure a try

“2014 is the year of clojure” Federic Gala i

Uncle Bo “it might be the seed that starts the
process towards the last programming language”

1 functional

•Immutable, persistent data structures •first-class functions •dynamic polymorphism

“object orientation is overrated”

“mutable stateful objects are the new spaghetti code” All data
structures immutable & persistent

“It is better to have 100 functions operate on one
data structure than to have 10 functions operate on 10 data structures." Alan J. Perli Many functions defined on few primary data structures

“polymorphism is a good thing” protocols for class polymorphism, multimethods
for custom hierarchies

2 LISP

•(Almost) no syntax •code is data, let’s do macros! •not
constrained by backwards compatibility

3 on the jvm

•embraces the jvm as a platform •fast! almost as fast
as java •tons of high quality libraries •mature echosystem

4 concurrency

moore’s law is over

threads & locks are a mess

the actor model was designed to address the problems of
distributed programs

•immutable data can be shared freely •atoms •transactional references (stm)
•async agents •csp with core.async

clojurescript 5

javascript is everywhere

javascript is not very robust

clojurescript to the rescue

•interoperates with javascript •brings much of clojure goodness to the
js world (incl. core.async!) •uses google closure optimizations

6 tools

•nrepl •leiningen •editors (emacs, vim, light table, eclipse, intellij, netbeans)
•testing (clojure.test, speclj, midje, test.check)

7 echosystem

•core.typed optional type system •core.logic for logic programming •om (clojurescript
+ facebook react) •overtone (clojure + supercollider)

•rapidly evolving web stack based on ring •immutant (jboss as7
+ ring) •datomic •http-kit

8 community

•vivid •inclusive •tons of tutorials and documentation

thanks!

Don't fear the paren! 8 reasons you should give...

Don't fear the paren! 8 reasons you should give Clojure a try

Giuseppe Capizzi

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Transcript

( ) DON’T FEAR THE PAREN! 8 reason you should

“2014 is the year of clojure” Federic Gala i

Uncle Bo “it might be the seed that starts the

1 functional

•Immutable, persistent data structures •first-class functions •dynamic polymorphism

“object orientation is overrated”

“mutable stateful objects are the new spaghetti code” All data

“It is better to have 100 functions operate on one

“polymorphism is a good thing” protocols for class polymorphism, multimethods

2 LISP

•(Almost) no syntax •code is data, let’s do macros! •not

3 on the jvm

•embraces the jvm as a platform •fast! almost as fast

4 concurrency

moore’s law is over

threads & locks are a mess

the actor model was designed to address the problems of

•immutable data can be shared freely •atoms •transactional references (stm)

clojurescript 5

javascript is everywhere

javascript is not very robust

clojurescript to the rescue

•interoperates with javascript •brings much of clojure goodness to the

6 tools

•nrepl •leiningen •editors (emacs, vim, light table, eclipse, intellij, netbeans)

7 echosystem

•core.typed optional type system •core.logic for logic programming •om (clojurescript

•rapidly evolving web stack based on ring •immutant (jboss as7

8 community

•vivid •inclusive •tons of tutorials and documentation

thanks!