Option...aly bored

This is great news. I had already taken Jason's advice to investigate the examples...

    val f = ☆((n: Int) => if (n % 2 == 0) None else Some((n + 1).toString))

      val g = ☆((s: String) => if (List(5, 7) ∃ (_ == s.length)) None else Some("[" + s + "]"))

   (List(7, 78, 98, 99, 100, 102, 998, 999, 10000) map (f >=> g apply _)) assert_≟ List(Some("[8]"), None, None, Some("[100]")

...I didn't get very far!

I gave a presentation recently on scala and found the following approach pretty useful (might be useful in this space as well):

1. Describe some simple problem
2. Solve the problem in Java (or imperative-style scala)
3. Iterate thru a few solutions introducing a few new Scala concepts at a time, ending up with something which can then be compared side-by-side with the original code to highlight clarity/compactness etc.

Also a description of who the audience for scalaz is: do you think it could provide useful abstractions for programmers "in the enterprise", or is it squarely aimed at academia?

Cheers, Chris

Date: Fri, 25 Dec 2009 14:28:16 +0100
Subject: Re: [scala-user] Option...aly bored
From: chris.twiner@gmail.com
To: tonymorris@gmail.com
CC: scala-user@listes.epfl.ch; oxbow_lakes@hotmail.com

I for one would invest in many a repeat read. Tuned and eagerly awaiting. (Not quite salivating but not far off)

On Dec 25, 2009 1:46 AM, "Tony Morris" <tonymorris@gmail.com> wrote:

I am strongly considering writing a "user manual" to appease this problem. Stay tuned. Tony Morris http://tmorris.net/
On Dec 25, 2009, at 12:38 AM, christopher marshall <oxbow_lakes@hotmail.com> wrote: > > Date: Thu,...

Have more than one Hotmail account? Link them together to easily access both.

I wonder how many people have watched Barbara Liskov's talk.  She gives her opinion on DSLs

http://www.infoq.com/presentations/liskov-power-of-abstraction;jsessionid=34B5245D85D5278FB95ED6B0A4A24B68



—Mohamed
On 29/12/09 12:33, christopher marshall wrote:

COL109-W103C81A3DABBCF9AB51D208D7A0 [at] phx [dot] gbl" type="cite">

This is great news. I had already taken Jason's advice to investigate the examples...
    val f = ☆((n: Int) => if (n % 2 == 0) None else Some((n + 1).toString))      val g = ☆((s: String) => if (List(5, 7) ∃ (_ == s.length)) None else Some("[" + s + "]"))   (List(7, 78, 98, 99, 100, 102, 998, 999, 10000) map (f >=> g apply _)) assert_≟ List(Some("[8]"), None, None, Some("[100]")...I didn't get very far!

I gave a presentation recently on scala and found the following approach pretty useful (might be useful in this space as well):

1. Describe some simple problem
2. Solve the problem in Java (or imperative-style scala)
3. Iterate thru a few solutions introducing a few new Scala concepts at a time, ending up with something which can then be compared side-by-side with the original code to highlight clarity/compactness etc.

Also a description of who the audience for scalaz is: do you think it could provide useful abstractions for programmers "in the enterprise", or is it squarely aimed at academia?

Cheers, Chris

Date: Fri, 25 Dec 2009 14:28:16 +0100
Subject: Re: [scala-user] Option...aly bored
From: chris.twiner@gmail.com
To: tonymorris@gmail.com
CC: scala-user@listes.epfl.ch; oxbow_lakes@hotmail.com

I for one would invest in many a repeat read. Tuned and eagerly awaiting. (Not quite salivating but not far off)


On Dec 25, 2009 1:46 AM, "Tony Morris"  wrote:

I am strongly considering writing a "user manual" to appease this problem. Stay tuned.


Tony Morris
http://tmorris.net/



On Dec 25, 2009, at 12:38 AM, christopher marshall  wrote:

  

Date: Thu,...
      

 		 	   		  
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