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![Scala Compiler Problem val foo = List[Map[String,String]]() foo ++ Map("bar" -> "baz")](https://image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-38-2048.jpg)
![Less Boilerplate case class Person ( val firstName : String , val lastName: String , val spouse: Option [ Person ]) { public Person(String firstName, String lastName, Person spouse) { this .lastName = lastName; this .firstName = firstName; this .spouse = spouse; } public String getFirstName() { return firstName; } public String getLastName() { return lastName; } public Person getSpouse() { return spouse; } public String toString() { return firstName + " " + lastName +](https://image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-47-2048.jpg)
![Kittens case class Person ( val firstName : String , val lastName: String , val spouse: Option [ Person ]) { public String getFirstName() { return firstName; } public String getLastName() { return lastName; } public Person getSpouse() { return spouse; } public String toString() { return firstName + " " + lastName +](https://image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-49-2048.jpg)
![Kittens and Aquaman case class Person ( val firstName : String , val lastName: String , val spouse: Option [ Person ]) { override def toString(): String = firstName + " " + lastName + return firstName + " " + lastName +](https://image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-51-2048.jpg)
![Scala case class Person ( val firstName : String , val lastName: String , val spouse: Option [ Person ]) {](https://image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-53-2048.jpg)
![Of Course... ( defrecord Person [fname lname spouse] Object](https://image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-62-2048.jpg)
![( toString [_]](https://image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-63-2048.jpg)
![( when-let [n ( :fname spouse)]](https://image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-65-2048.jpg)
![Scala Compiler Problem val foo = List[Map[String,String]]() foo ++ Map("bar" -> "baz")](https://crownmelresort.com/image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-38-2048.jpg)
![Less Boilerplate case class Person ( val firstName : String , val lastName: String , val spouse: Option [ Person ]) { public Person(String firstName, String lastName, Person spouse) { this .lastName = lastName; this .firstName = firstName; this .spouse = spouse; } public String getFirstName() { return firstName; } public String getLastName() { return lastName; } public Person getSpouse() { return spouse; } public String toString() { return firstName + " " + lastName +](https://crownmelresort.com/image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-47-2048.jpg)
![Kittens case class Person ( val firstName : String , val lastName: String , val spouse: Option [ Person ]) { public String getFirstName() { return firstName; } public String getLastName() { return lastName; } public Person getSpouse() { return spouse; } public String toString() { return firstName + " " + lastName +](https://crownmelresort.com/image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-49-2048.jpg)
![Kittens and Aquaman case class Person ( val firstName : String , val lastName: String , val spouse: Option [ Person ]) { override def toString(): String = firstName + " " + lastName + return firstName + " " + lastName +](https://crownmelresort.com/image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-51-2048.jpg)
![Scala case class Person ( val firstName : String , val lastName: String , val spouse: Option [ Person ]) {](https://crownmelresort.com/image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-53-2048.jpg)
![Of Course... ( defrecord Person [fname lname spouse] Object](https://crownmelresort.com/image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-62-2048.jpg)
![( toString [_]](https://crownmelresort.com/image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-63-2048.jpg)
![( when-let [n ( :fname spouse)]](https://crownmelresort.com/image.slidesharecdn.com/cufp-101002193712-phpapp01/75/Naivete-vs-Experience-65-2048.jpg)
Uploaded byMike Fogus
Naïveté vs. Experience
The document discusses the authors' initial naive expectations for using Scala and Clojure compared to their actual experience. They initially thought the languages would solve issues like boilerplate code and Java compiler problems, but found they still had to deal with interoperability, immutability, and other functional programming concepts. In the end, Clojure met more of their needs due to its emphasis on seamless interoperability, traits, and pattern matching.
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Naïveté vs. Experience
- 1. Naïveté vs. ExperienceHow We Thought We Could Use Scala and Clojure, and How We Actually Did
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- 4. AI, Distributed Simulation,Code Generation, Machine Vision
- 5. C, C++, Java,CLIPS, Clojure, Scala
- 6. Co-author of The Joy of Clojure http://joyofclojure.com Local Boy Michael Fogus: Programmer
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- 12. Essential Boilerplate equalshashCode get set public Foo toString
- 13. Essential Boilerplate equalshashCode get set public Foo toString try catch finally ; { } @override static int System.out boolean . void import String Exception throws toString toString throws throws finally finally finally get get equals hashCode try } System.out boolean toString throws throws finally get public Foo catch finally ; int import String Exception throws toString get equals get toString try finally static import String toString throws finally equals try toString throws get finally String Exception hashCode finally { @override int void Exception toString throws finally hashCode toString throws finally public Foo finally int Exception @override static finally hashCode try throws throws static @override hashCode throws hashCode @override void toString toString int hashCode void finally finally public Foo int hashCode @override void toString toString int hashCode void finally finally public Foo int hashCode @override void toString toString int hashCode void finally finally public Foo int toString static finally equals try finally String toString throws finally toString finally
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- 17. Java Compiler ProblemList<Map<String,String>> foo = new ArrayList<HashMap<String,String>>(); foo.add(new HashMap() {{ put(“bar”, “baz”); }});
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- 38. Scala Compiler Problemval foo = List[Map[String,String]]() foo ++ Map("bar" -> "baz")
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- 42. Clojure Compiler Problem(def foo {}) (assoc foo “bar” “baz”)
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- 44. Clojure Compiler ProblemRuntime Да
- 45. Essential Boilerplate publicclass Person { private String lastName; private String firstName; private Person spouse; public Person(String firstName, String lastName, Person spouse) { this .lastName = lastName; this .firstName = firstName; this .spouse = spouse; } public String getFirstName() { return firstName; } public String getLastName() { return lastName; } public Person getSpouse() { return spouse; } public String toString() { return firstName + " " + lastName +
- 46. (spouse != null ? " married to " + spouse.getFirstName() + "." : "." ); } }
- 47. Less Boilerplate caseclass Person ( val firstName : String , val lastName: String , val spouse: Option [ Person ]) { public Person(String firstName, String lastName, Person spouse) { this .lastName = lastName; this .firstName = firstName; this .spouse = spouse; } public String getFirstName() { return firstName; } public String getLastName() { return lastName; } public Person getSpouse() { return spouse; } public String toString() { return firstName + " " + lastName +
- 48. (spouse != null ? " married to " + spouse.getFirstName() + "." : "." ); } }
- 49. Kittens case class Person ( val firstName : String , val lastName: String , val spouse: Option [ Person ]) { public String getFirstName() { return firstName; } public String getLastName() { return lastName; } public Person getSpouse() { return spouse; } public String toString() { return firstName + " " + lastName +
- 50. (spouse != null ? " married to " + spouse.getFirstName() + "." : "." ); } }
- 51. Kittens and Aquamancase class Person ( val firstName : String , val lastName: String , val spouse: Option [ Person ]) { override def toString(): String = firstName + " " + lastName + return firstName + " " + lastName +
- 52. (spouse != null ? " married to " + spouse.getFirstName() + "." : "." ); } }
- 53. Scala case class Person ( val firstName : String , val lastName: String , val spouse: Option [ Person ]) {
- 54. override def toString(): String = firstName + " " + lastName +
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- 56. case None => "."
- 57. case Some(s)=> " married to " + s.firstName + "."
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- 59. } By default , Scala classes are immutable.
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- 62. Of Course... (defrecord Person [fname lname spouse] Object
- 63. ( toString [_]
- 64. ( str fname " " lname
- 65. ( when-let [n ( :fname spouse)]
- 66. ( str " married to " n))
- 67. \.))) By default , Scala classes are immutable.
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- 72. Everything is anObject
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- 95. Everything is anObject
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- 104. Everything is anObject Embedded XML Functional Programming
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- 116. Type Aliases TraitsFunctional Programming
- 117. List Comprehensions ImmutabilityPattern Matching
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- 121. Interoperability (near seamless– essential)
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- 124. Type Aliases classService extends IService {
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- 127. } By default , Scala classes are immutable.
- 128. Type Aliases classService extends IService {
- 129. def get(ref: ReferenceParam): ComponentReturn = { ... }
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- 132. Type Aliases classService extends IService {
- 133. def get(ref: ReferenceParam): ComponentReturn = { ... }
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- 135. } type ReferenceParam = java.util.Map[String,String] type ComponentReturn = java.util.Map[String,Object]
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- 139. Traits class Service extends IService {
- 140. def get(ref: ReferenceParam): ComponentReturn = { ... }
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- 142. } trait RPCTypes { type ReferenceParam = java.util.Map[String,String] type ComponentReturn = java.util.Map[String,Object]
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- 144. Traits class Service extends IService with RPCTypes {
- 145. def get(ref: ReferenceParam): ComponentReturn = { ... }
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- 147. } trait RPCTypes { type ReferenceParam = java.util.Map[String,String] type ComponentReturn = java.util.Map[String,Object]
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- 149. RPCTypes LocalTypes CachedTypesDelayedTypes ... RPCTypes LocalTypes ... The Internet
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- 153. When a treefalls in a lonely forest ... does it make a sound? – Charles Riborg Mann and George Ransom Twiss
- 154. If a purefunction mutates some local data in order to produce an immutable return value, is that ok? – Rich Hickey
- 155. Pattern Matching (alanguage for error shapes)
- 156. Currying (gratuitous, butcool, control structures)
- 157. Closures (gratuitous, butcool, simplified delays)
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- 169. Grand Hierarchies Literals-liteClojure!
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- 172. Dean Wampler forfeedback
- 173. Rich Hickey andMartin Odersky for Clojure and Scala
- 174. Chris Houser myco-author
- 175. Ryan Tomayko forthe screaming face
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- 177. Questions? (example questionsbelow) Joel or Mike?
- 178. Is Scala toocomplicated?
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- 180. Kobaia is dehundin?
- 181. Favorite hangout inBaltimore?
- 182. What's with thetie?