상상할 수 있는 힘이 모자라다

In last post, I used 2 dimension array. Below is 1 dimension version. class Board   def initialize(rows, cols)     @rows, @cols = rows, cols     @blocks = [...

Actually this quiz came from 'minesweeper' of programming challenges. It's not difficult code, so skip explanation. And I have another idea that can reduce amount of memory usage when input data ...

We did it!! Our CLIK won the competition!! Thanks to our Climate Application Team(CAT in APCC21) - Dr. Saji, Kyong-Hee An, Young-Mi Min. They are pretty brilliant people, so I'm honored that I can w...

module Kernel   def enum(*syms)     new_class = Class.new do       def initialize(name)      &...

OK. Time to play with server side. I'll show all building step of building server side expect install rails and deploy it. You can find some nice documents on the internet. :-) At first, I need ...

Here is the montoring program. It is run by cron at every 5 minutes. It call target site's target page with specific query url (because, it is searching result page). Then it parse html through hpri...

Since our son was born (8/2007), we often bought second hand toys for our son on the Internet. Sometimes we could get some items very easy with reasonable price. But sometimes it's so difficult, bec...

If you are reasonable rails developer, you are so familiar with " &:symbol ". Have you thought how it work?Start with '&' operator. If you pass something with '&' to method, ruby think t...

Four Boxes (I translated this quest from http://xper.org/wiki/seminar/FourBoxes) Quest There are four rectangles in plan and all their base of four rectangles are in parallel with the horizontal ...

def sum_of_divisors(num)   divisors = [1]   (2..Math::sqrt(num)).each do |e|     if num % e == 0       divisors << e    &n...