Maniagnosis

Erin, I'm not sure what you mean. getCanonicalPat...

2009-11-30T11:20:31.636-06:00

Erin, I'm not sure what you mean. getCanonicalPath is a round-about way of determining whether the current root is a symbolic link or not. (I added the original recursive delete method to the post, for illustration.)

You are right that there is a real difference between getAbsolutePath and getCanonicalPath, and that the former is probably what is called for, most of the time.

Note the real problem here is that developers (per...

2009-11-30T07:12:33.619-06:00

Note the real problem here is that developers (perhaps ignorantly) rely on getCanonicalPath() in the first place.

The javadoc for getCanonicalPath() explains that it will resolve symlinks-- if the developers of Tomcat (and other software) were paying attention, they'd realize that normalizing the absolute path is "safer" (in terms of respecting symlinks) than using the canonical path.

"news"?

2009-11-26T21:59:31.475-06:00

"news"?

Excellent presentation! I wish I had been there, ...

2009-06-25T14:31:17.121-05:00

Excellent presentation! I wish I had been there, particularly for that Historically bad ideas track.

Hi Tommy, glad to hear you like those columns. If ...

2009-06-23T22:48:43.926-05:00

Hi Tommy, glad to hear you like those columns. If you're interested in more "what's wrong with RPC" arguments, you might also find these QCon London 2009 slides interesting.

You're absolutely correct: those are way out of da...

2009-02-02T18:04:22.867-06:00

You're absolutely correct: those are way out of date. I will update it as soon as I get a spare few minutes.

I believe the new Spring IDE update site is http://dist.springframework.org/release/IDE, the SpringSource dm server update site is http://static.springsource.com/projects/sts-dm-server/update, and the server itself can be found at http://www.springsource.com/download/dmserver.

This is important stuff, here.

2009-01-28T10:24:58.641-06:00

This is important stuff, here.

Thanks for the instructions. They may need some u...

2009-01-27T10:38:06.758-06:00

Thanks for the instructions. They may need some updates now for the new version of dm server and also the update sites.

Ah, that is indeed slightly less than optimal in S...

2009-01-10T23:17:24.866-06:00

Ah, that is indeed slightly less than optimal in Scala

I solve it either with a companion object

object Rational {
def gcd(a : Int, b : Int) = ...
def apply(num : Int, den : Int) = {
val g = gcd(num, den)
new Rational(num / g, den / g)
}

class Rational private(val num : Int, val den : Int)

or with alternative names on the params - I usually prepend with an underscore so I don't accidentally use them. If I don't want gcd to be a field I just make sure it's scoped properly

class Rational (_num : Int, _den : Int) {
val (num, den) = {
val gcd = ..
(_num / gcd, _den / gcd)
}
}

Ok, case classes are niiiiiiiice. And here I was j...

2009-01-10T20:56:18.380-06:00

Ok, case classes are niiiiiiiice. And here I was just using them for algebraic data types. Of course, the "case" label is a little odd.

What about the next version of Rational:

class Rational8(n:Int, d:Int) {
private val g = gcd(n abs, d abs)
val numer = n / g
val denom = d / g
override def toString = numer + "/" + denom
private def gcd(a:Int, b:Int) :Int = if (b==0) a else gcd(b, a%b)
}

This class does not include n and d fields, but it would if I'd thinko-ed toString. Further, it has a g field that is only used in the primary constructor. Good thing memory is free.

I'm still concerned about language features that have unexpected consequences. For some reason, I am just reminded of the Mach interface generator, an IDL compiler. Mig had several keywords associated with parameters passed between processes, each with semantics (particularly performance-related semantics) that were not obvious from the keyword.

Not a problem.For an immutable Rational with acces...

2009-01-10T15:48:59.398-06:00

Not a problem.

For an immutable Rational with accessible fields

class Rational(val num : Int, val den : Int)

or better yet

case class Rational(num : Int, den : Int)

for a mutable one

class Rational(var num : Int, var den : Int)

or better yet

case class Rational(var num : Int, var den : Int)

Wicd looks like it is a little more manual than nm...

2008-08-13T15:04:12.969-05:00

Wicd looks like it is a little more manual than nm-applet, but it works great! Thanks for the tip!

Found your blog from a link to the "Infernal Devic...

2008-08-13T10:42:35.448-05:00

Found your blog from a link to the "Infernal Device" section of your site from a link in a LTU post. Enjoying the site.

Anyway,
I'm a recent Archlinux convert (hardy was a bit too frustrating for my tastes) and have had great experiences with WICD for wireless management. It should be in the hardy repos. Few dependencies. Just a thought.

Regards,
Brit Butler
http://www.redlinernotes.com/

My name is Obie Fernandez (with an 'F')... thanks ...

2008-08-12T23:51:42.327-05:00

My name is Obie Fernandez (with an 'F')... thanks for the great notes of the conference.