MakerLegoBot: Lego Mindstorms NXT 3D Lego Printer

Google Appe Engine test

Follow the IBM tutorial part 1 and check the Resources section to download SDK, eclipse plugin, App Engine account and links to other articles.

• Pros: most cost effective, reliable solution to host Java app.  IDE, SDK and documents/books are mature and available.
• Cons: lock-in to GAE due to its proprietary API.

Tutorial

1. IBM tutorial, Part 1:Rev it up!
2. IBM tutorial, Part 2:Building the killer app
3. IBM tutorial, Part 3:Persistence and relationships 

Part 1: Two sample apps - Hello World GAE servlet, and a simple GWT app.  No coding -- just create a project and run. Shows how to deploy it to GAE environment.  See this example: http://keith-greeting.appspot.com/

Part 2: More advanced example, uses GWT.

Part 3: Extending part 2 example, with persistence.


To Try:

• GAE+Clojure

Using SVN on Mac

Get the binary from here: http://www.open.collab.net/downloads/community/

Setting up CVS pserver on OSX 10.4 and up (10.5, 10.6)

There's no /etc/inetd.conf, or /etc/xinetd.conf.  New version of OSX uses something called "launchd."

Read following pages for setting up pserver.

• http://www.afp548.com/article.php?story=20050716191439302
• http://discussions.apple.com/thread.jspa?threadID=2123254

See:
Launchd - http://developer.apple.com/macosx/launchd.html

Copy & Paste from above site -- just in case :

CVS pserver launchd item for OS X 10.4
Tuesday, August 02 2005 @ 08:14 pm MDT
Contributed by: ChrisRyland
Views: 6,637
TipsInspired by the recent excellent launchd overview on afp548, I needed to set up a CVS pserver on our new Tiger Xserve box, migrating from an old Linux server.

Here's a recipe that seems to work.

You'll need to create a launchd control file, call it cvspserver.plist, and put it in /Library/LaunchDaemons (where local launch control files are supposed to live):

        Label
        com.apple.cvspserver
        UserName
        cvs
        Program
        /usr/bin/cvs
        ProgramArguments
        
                cvs
                -f
                --allow-root=/Users/cvs
                pserver
        
        Sockets
        
                Listeners
                
                        SockPassive
                        
                        SockServiceName
                        cvspserver
                        SockType
                        SOCK_STREAM
                
        
        inetdCompatibility
        
                Wait
                
        

You'll have to change the --allow-root=/Users/cvs CVS root specification above to match your actual root, but otherwise the above should work.

Next, it doesn't appear that cvs under Tiger can access the standard user/password database, so you'll have to create a password file in your $CVSHOME/CVSROOT directory:

$ cd ~cvs/CVSROOT
$ sudo htpasswd -c passwd user1
$ sudo htpasswd passwd user2 # etc.

Then, you'll need a

# launchctl load /Library/LaunchDaemons/cvspserver.list

and you should be in business. (At the next reboot, cvspserver.plist should be picked up by launchd.)

Google Go, windows version is out

There were only Linux/OSX versions – now someone built it for Windows ( http://code.google.com/p/go-windows/ ).  Go get this file - http://go-windows.googlecode.com/files/go-1.zip

To install, unzip and set the following environment variables:

set GOROOT=[the go folder]
set GOOS=mingw
set GOARCH=386 

and then add GOROOT\bin directory to PATH.

• Go Hompage: http://golang.org/
• Go packages: http://golang.org/pkg/
• Tutorial: http://golang.org/doc/go_tutorial.html

Sample Hello world source. Save below as “hello.go”:

package main
import "fmt"
func main() {
    fmt.Printf("hello, world\n")
}

How to compile:

% 8g hello.go -> produces "hello.8"
% 8l hello.8 -> produces "8.exe"  (or "8.out" in Linux)

Using Clojure in Cygwin

 

Create a shell script as below:

#!/usr/bin/bash 
CLASS_PATH=/java/lib/clojure.jar:/java/lib/jline.jar 
CMD="java -cp `cygpath -wp $CLASS_PATH`" 
SHELL="jline.ConsoleRunner clojure.main" 
SCRIPT="clojure.main" 

if [ "$1" ]; then 
  $CMD $SCRIPT $1 
else 
  $CMD $SHELL 
fi