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Changes for page WebObjects with Scala

Last modified by Ravi Mendis on 2011/05/10 02:10
From version 505.1
edited by Ravi Mendis
on 2010/12/24 01:00
Change comment: There is no comment for this version
To version 508.1
edited by Ravi Mendis
on 2010/12/24 03:01
Change comment: There is no comment for this version

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1 1  === What is Scala? ===
2 2  
3 -[[Scala>>http://www.scala-lang.org/]] is a modern, multi-paradigm JVM language that is most often compared to [[Groovy>>http://en.wikipedia.org/wiki/Groovy_(programming_language)]], [[Clojure>>http://en.wikipedia.org/wiki/Clojure]] or [[Erlang>>http://en.wikipedia.org/wiki/Erlang_(programming_language)]]. Its [[functional language>>http://en.wikipedia.org/wiki/Functional_programming]] foundations and built-in Actors library make it especially attractive for concurrent computing. (Scala is an abbreviation for "scalable" hinting at its design goals). In this day and age of multi-core processors concurrent computing can not be ignored.
3 +[[Scala>>http://www.scala-lang.org/]] is a modern, multi-paradigm JVM language that is most often compared to [[Groovy>>http://en.wikipedia.org/wiki/Groovy_(programming_language)]], [[Clojure>>http://en.wikipedia.org/wiki/Clojure]] or [[Erlang>>http://en.wikipedia.org/wiki/Erlang_(programming_language)]]. Its [[functional language>>http://en.wikipedia.org/wiki/Functional_programming]] foundations and built-in [[Actors>>http://en.wikipedia.org/wiki/Actor_model]] library make it especially attractive for concurrent computing. (Scala is an abbreviation for "scalable" hinting at its design goals).
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5 -Many of the design features of Scala have been chosen with concurrency in mind, some of which may not be unfamiliar to Objective-C or WebObjects developers. Here's a summary:
5 +In this day and age of multi-core processors concurrent computing can not be ignored. Many of the design features of Scala have been chosen with concurrency in mind, some of which may not be unfamiliar to Objective-C or WebObjects developers. Here's a summary:
6 6  
7 7  |= |= Objective-C |= Java |= Scala
8 8  |= Immutability | Partial - via collections //e.g: NSArray/NSMutableArray// | No | Yes
9 9  |= Closures | Yes - via Blocks (//Extension//) | No | Yes - via Anonymous Functions
10 10  |= Static variables | Yes | Yes | No
11 -|= Static methods or functions | Yes | Yes | No
11 +|= Static methods | Yes | Yes | No
12 12  |= Concurrency | Yes - via [[Grand Central Dispatch>>http://en.wikipedia.org/wiki/Grand_Central_Dispatch]] (//Extension//) | //Yes - via Threads// | Yes - via [[Actors>>http://en.wikipedia.org/wiki/Actor_model]]
13 13  |= |= Weakly Typed |= --Strongly Typed-- |= Strongly Typed
14 14  
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16 16  
17 17  |= |= Objective-C |= Java |= Scala
18 18  |= Parametered methods | Yes //e.g: addObject: to~:// | No | Yes //e.g: add(object= ,to=)//
19 -|= Class composition | Categories | Interfaces | Traits
19 +|= Class composition | Yes - via Categories | Yes - via Interfaces | Yes - via [[Traits>>http://en.wikipedia.org/wiki/Trait_(computer_science)]]
20 20  
21 21  === Why Use Scala? ===
22 22