Slides from my Scala presentation at the Seattle Tech Startups meeting

[Tim Underwood]

Hi all,

I gave a short talk on Scala last night at the Seattle Tech Startups meeting (http://www.seattletechstartups.com/).  I've posted my slide deck if anybody needs material for their own Scala presentation:  http://www.startupmonkeys.com/2011/02/scala-frugal-mechanic/

-Tim

[mepcotterell]

I like this. I actually referred a friend of mine who is interested in learning Scala to these slides (along with links to some other material too). Great job!

[Brick Red]

Cool scala language summary.

[Stefan Wagner]

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Hi Tim, Hi list

The java example on page 12 could be more fair with the simplified
for-loop, introduced about 5 years ago:

for (Character c: name.toCharArray ())
if (Character.isUpperCase (c)) {
hasUpperCase = true;
break;
}

and still be impressive. ;)

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Tsch���--->...Stefan
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Don't visit my homepage at:
http://home.arcor-online.net/hirnstrom
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[Tim Underwood]

Sure. Except using toCharArray has a potential performance hit since it creates a newly allocated character array.  If my string is something like:

Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.......repeat for a long time....

The Scala and Java versions from the slides only need to look at the first character (without any allocation*).  Using toCharArray will first convert the entire string to a character array and then start iterating over it.

-Tim

* - Okay the Scala version might include allocating a wrapper class for the string (which is better than duplicating the entire string), but I think escape analysis might optimize that away.

On Tue, Feb 22, 2011 at 3:17 AM, Stefan Wagner <wagner...@berlin.de> wrote:

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Hi Tim, Hi list

The java example on page 12 could be more fair with the simplified
for-loop, introduced about 5 years ago:

for (Character c: name.toCharArray ())
       if (Character.isUpperCase (c))  {
               hasUpperCase = true;
               break;
       }

and still be impressive. ;)

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Tschööö--->...Stefan