http://www.industryzero.com It is really about nothing Mon, 01 Mar 2010 20:30:43 +0000 http://backend.userland.com/rss092 en Here is a question comes up a lot. Here is how to do it without additional plugin. config/database.yml: development: adapter: sqlite3 database: db/development.sqlite3 timeout: 5000 second_development: adapter: sqlite3 database: db/second_development.sqlite3 timeout: 5000 test: adapter: sqlite3 database: db/test.sqlite3 timeout: 5000 second_test: adapter: sqlite3 database: db/second_test.sqlite3 timeout: 5000 production: adapter: sqlite3 database: db/production.sqlite3 timeout: 5000 second_production: adapter: sqlite3 database: db/second_production.sqlite3 timeout: 5000 migration for models in first database is like normal ... http://www.industryzero.com/2010/03/01/how-to-set-up-multiple-databases-in-rails-project/ I am currently reading a book on Erlang Programming by Francesco Cesarini:Erlang Programming .  It is quite well written.  In it, there is some programming exercises.  One of them is to write a simple key value DB.  So I wrote one.  Here it is: -module(db). -export([new/0,destroy/1,write/3,delete/2,read/2,match/2]). new()->Db=[], Db. destroy(Db)->_=Db, ok. write(Key,Element,Db)->NewDb = [{Key,Element}|delete(Key,Db)], NewDb. delete(Key,Db)->case Db of [H|T] -> case H ... http://www.industryzero.com/2009/09/04/erlang-programming-example-one/ Yes, it is true.  I have tried it on many times and look at them side by side.  I will say Bing is as good if not better than Google.  Google now finally have a competitor.  Yahoo makes the right decision to use Bing.ShareThis http://www.industryzero.com/2009/07/30/bing-is-equal-if-not-better-than-google/ This is ofcourse a rhetorical question.  I know we can't write law like we write software because the political process will never be able to do that.  But think for a moment for the why shouldn't we?  Law likes software is a set of rule governing a system.  Although law ... http://www.industryzero.com/2009/07/23/why-cant-we-write-law-like-we-write-software/ The winner is Palm Pre SDK.  Why?  Palm picks a good architecture using javascript, html and css as its core technologies.  There is little learning curve. Unlike iphone which you need to learn Objective-C, xcode, Cocoa, etc.   It also follows convention over configuration (similar to rails).  Using Eclipse as ... http://www.industryzero.com/2009/07/21/palm-pre-sdk-vs-iphone-sdk/ I just installed the Palm Pre SDK which includes the emulator.  I also installed the eclipse plug-in.  I have to say.  It is so far so good.  Palm has  a good website to guide you through: http://developer.palm.com/index.php .  I am going to play more and see how easy it is ... http://www.industryzero.com/2009/07/20/palm-pre-sdk-and-emulator/ I am reading Erlang programming by Francesco Cesarini and Simon Thompson.  The book show you how to start up a debugger. by typing debugger:start(). in the erlang shell.  However, that is not enough.  The book implies that you will see the modules automatically.  Not true.  You will have to type ... http://www.industryzero.com/2009/07/17/how-to-start-erlang-debugger/ Add these two sites through help->software updates Name :RDT URL : http://updatesite.rubypeople.org/release Name :RadRails URL : http://radrails.sourceforge.net/updateShareThis http://www.industryzero.com/2009/06/18/install-radrails-on-eclipse-without-aptana/ I am learning scala and erlang the same time to get an idea of FP.  So far, I like Erlang better in term of syntax.  Scala is good but its syntax is just getting too complicated.  It is trying to replace java but the its syntax is no simpler than ... http://www.industryzero.com/2009/06/10/scala-vs-erlang/ I am starting to learn Scala. This will be my first step to Functional programming world (even though Scala is not a pure functional programming language, it supports OO too).  I highly recommended this article for anyone who wants to take the first step: http://www.artima.com/scalazine/articles/steps.html .ShareThis http://www.industryzero.com/2009/06/08/learning-scala/