Derek,
With the upcoming release of 2.7.2, you can update all this classOf[T] stuff
to use scala.reflect.Manifest[T], which handles all that stuff for you
almost automagically.
I've been meaning to blog about this, but haven't found the time. The short
example is:
def find[A](id:
Please also see:
http://blog.lostlake.org/index.php?/archives/50-The-Scala-Option-class-and-how-lift-uses-it.html
Can[T] is just like Option[T]
Marius wrote:
to get stuff out of a can you can do:
1. Pattern matching
having c a Can[String]
c match {
case Full(value) = //do something
Thanks. I have read everything I could find on this but I think I'm just
a bit dense about it. Probably, it's just unfamiliarity with the syntax
of Scala as a whole and functional programming in general (or maybe I'm
just stupid). Hopefully, at some point the light bulb will come on and
this
One of the hardest parts about learning Lift and Scala is not really
know what objects look like. Things get pretty complicated and it's
difficult to remember what's in what.
It would be very nice to be able to step through Lift and see exactly
what is where in memory and how things change,
Charles,
A Can is a container... it can contain a thing or be empty.
You can transform the contents of a Can from one thing to another using
map(). map() on Can, Option, List is exactly the same as map() on Array
in Ruby:
irb(main):004:0 [1,2,3].map{|v| v.to_s + Cats}
= [1 Cats, 2 Cats, 3
How do I create a new 0.10-SNAPSHOT project with the mvn archetype?
regards
Bjarte
Bjarte S. Karlsen:
Hello David,
I am using 0.9 it looks like. But I can upgrade to 0.10-SNAPSHOT tonight and
check out this change. The only thing I have done in the project is to try to
adapt the
mvn archetype:create -U \
-DarchetypeGroupId=net.liftweb \
-DarchetypeArtifactId=lift-archetype-basic \
-DarchetypeVersion=0.10-SNAPSHOT\
-DremoteRepositories=http://scala-tools.org/repo-snapshots \
Also check out CanSpec.scala to get an idea of how Cans can be used.
--j
On Wed, Oct 15, 2008 at 9:33 AM, David Pollak [EMAIL PROTECTED] wrote:
Charles,
A Can is a container... it can contain a thing or be empty.
You can transform the contents of a Can from one thing to another using
Never mind I got it working :)
I will play around with it and ask questions here or in #lift on freenode.
regards
Bjarte
Bjarte S. Karlsen:
How do I create a new 0.10-SNAPSHOT project with the mvn archetype?
regards
Bjarte
Bjarte S. Karlsen:
Hello David,
I am using 0.9
Charles, to put this in the context of the JPA stuff I'm working on, here's
the pattern I would use for, say, viewing an Author when I have a
corresponding RequestVar:
object passedAuthor extends RequestVar[Can[Author]](Empty)
def view (xhtml : NodeSeq) : NodeSeq = passedAuthor.map({ author =
Jorge, that's great news! Having to use the classOf definitely felt a little
clunky so this will help clean things up a lot. The undocumented and
experimental part scares me a little, but if this will eventually be core
functionality I think we'll definitely move to it.
Thanks,
Derek
On Wed,
Ah, that's a good idea. Didn't think of that.
Chas.
Jorge Ortiz wrote:
Also check out CanSpec.scala to get an idea of how Cans can be used.
--j
On Wed, Oct 15, 2008 at 9:33 AM, David Pollak [EMAIL PROTECTED]
mailto:[EMAIL PROTECTED] wrote:
Charles,
A Can is a container...
Yes, this does help a bit.
I actually understand the Can (and Option) very well, and I think it's a
great idea (though the added advantage of the Can doesn't seem to be
heavily used yet).
The problem I was having was dealing with cans inside cans inside cans.
But after reading everything
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