The Rubyist Journal

Specify precision and scale attributes for decimal number with scaffold/model/migration generators in Rails 3.2.0

joneslee85 — Sun, 22 Jan 2012 22:35:20 +0000

By using the short hand :decimal{precision, scale}, rails generator lets you generate number migration with decimal and scale. You could use {precision, scale} or {precison-scale} or {precision.scale} shorhand:

rails g scaffold Product title:string price:decimal{8,2}

the above would generate a migration of:

t.decimal :price, :precision => 8, :scale => 2

NOTE: sadly, this feature is so broken as of the release of 3.2.0 and is addressed in the bug #4602.

Happy Lunar New Year!

joneslee85 — Sun, 22 Jan 2012 13:45:41 +0000

Happy New Year to all friends and readers. You guys have been, are and always be my inspiration to write and contribute to the great Ruby community. I would like to take this opportunity to extend my wish to all of you a year of Dragon full with prosperities, wealths and lucks.

Introduction to The Suicidal Jumpman Ruby game aka ROFLBALT

joneslee85 — Tue, 17 Jan 2012 06:35:30 +0000

Hi folks, the last 3 days were MADLY fun for me @ Railscamp X (Adelaide). I was blown away with beers, whiskey, Werewolfs, foods, geeks, hackers and their SUPERCOOL hacks. Dennis Hotson (@dennishotson) and Paul Annesley (@pda) decided to join force to create a game that if was released before Mario, it would probably take on the world. (Unfortunately it was 25 years later). The game goal is to sustain alive by jumping on the top of the building as long as possible.

It is interesting to see the progress that Paul and Dennis made, from such few characters to draw the man (not knowing jumping yet) and build blocks to animated jumpman chasing the helicopter which blasted to pieces if bumped into buildings (/w blood trails on the building). Paul and Dennis called the game ROLFBALT, for me I would call it the Suicidal Jumpan for its bloody ending scene. I rank this game 2nd after the Wolf3D clone Rubystein. Give it a try now at https://github.com/pda/roflbalt

Replace Honda Accord Euro MY05 Battery

joneslee85 — Thu, 15 Dec 2011 11:41:16 +0000

This year is the worst year of my life, everything is breaking down. And just a week before X-Mas, my car battery decided to retire after 5 years of hard work. So I started venturing into the World Wide Web to find a best replacement part. After digging into few forums, all recommended to go for ACDelco 430 or Supercharge Gold MF75****. It turns out that those batteries does not fit perfectly with my Accord Euro MY05. Besides, they are quite expensive too ~ around $150 AUD. In the end I called up John Blair Honda Parts and got a good deal for the Supercharge Silver SMF55D23L for $130. Off I went to pick it up and quickly got my dead battery replaced. Now my car roar like a real lion with a full 500CCA (the stock part is 300CCA though). I think I should hit the road now

Open Cubic Player (ocp) is now available under Homebrew for all MacOS X

joneslee85 — Mon, 12 Dec 2011 09:54:29 +0000

For whom who doesn’t know what Open Cublic Player (ocp) is, this application is a pure console music player for DOS and *NIX based platform. It was one of the most popular app of the DOS era. Though lacking mouse control and a graphical user interface, many hackers/developers still prefer it to other GUI music players for its light overhead and rich features.

Today, I am delighted to announce that ocp Formula is officially committed into Homebrew repository. I’d like to thank Stian for the great app and for being patient with me on many emails back and forth on fixing nested functions compiling issues with gcc on OSX. To all console lovers out there, you can start trying out this great app right now:

$ brew update
$ brew install ocp
$ ocp

Bugs reports are greatly welcomed. Enjoy!

Best way to read codes before you sleep

joneslee85 — Sun, 04 Dec 2011 10:40:30 +0000

Before I go to bed, I force myself to read code on my laptop while laying on bed. I normally lie down sideway facing left or right so I am more comfortable reading code that is vertically rotated. Thanks to Vico text-editor orientation feature, I could set the Orientation to Vertical and all codes are now vertically rotated for me.

Quantum talk by Damian Conway @ YOW 2011

joneslee85 — Thu, 01 Dec 2011 23:23:23 +0000

Damian is a truly world-class speaker. His talk on Temporally Quaquaversal Virtual Nanomachine Programming In Multiple Topologically Connected Quantum-Relativistic Parallel Timespaces is very inspiring. I’d recommend you to check that out once the talk video is up online.

Multi-line comment with Ruby

joneslee85 — Wed, 30 Nov 2011 12:17:49 +0000

=begin
line 1 blah blah
line 2 blah blah
=end

Love hopes all things

joneslee85 — Fri, 25 Nov 2011 03:59:22 +0000

The Truelove

There is a faith in loving fiercely
the one who is rightfully yours,
especially if you have
waited years and especially
if part of you never believed
you could deserve this
loved and beckoning hand
held out to you this way.

I am thinking of faith now…

Well Love hopes all things and I hope you. I love you

Howto remap Alt key to Meta key and Windows key to Option key on a PC keyboard for OSX?

joneslee85 — Tue, 22 Nov 2011 23:09:31 +0000

Apple is famous for beautiful design with poor usability. After typing for a while, my fingers hurt so I decided not to use the Mac keyboard and replace it with a PC keyboard, in my case is the shiny and hefty Realforce 87UW keyboard. The downside of PC keyboard is the position of the Windows ~ Apple key is swapped with the Alt key. In one of my old post, I used DoubleCommand to remap those keys, yet I have been feeling there must be a easier way. Now I found a way w/o installing any external apps, here is how:

1. Go to System Preferences > Keyboards > Modifiers Keys

2. Select the keyboard: Realforce 87 (yours differs)

3. Select Apple Command for Option Key

4. Select Option Key for Apple Command