kyama

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  <channel>
    <title>首相官邸</title>
    <link>https://www.kantei.go.jp</link>
    <description>公式サイトからの新着情報を取得しました。</description>
    <atom:link href="https://www.kantei.go.jp" rel="self"/>
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kyama

# 半月分の日の一覧を表示
# 参考:http://qiita.com/ozamasa/items/20853d5fce6677d0f346
require 'date'
0.upto(14).inject(Date.new(2015,2,2)){|d,i|puts (d+i).strftime("%2m月%2d日(#{%w(日 月 火 水 木 金 土)[(d+i).wday]})");d}

kyama

// 
// Zero-suppressed binary decision diagram with family algebra operations
//
// References: 
//   S. Minato (1993): 
//     Zero-suppressed BDDs for set manipulation in combinatorial problems.
//     Proceedings of the 30st annual Design Automation Conference, pp. 272-277.
//   S. Minato (1994):
//     Calculation of unate cube set algebra using zero-suppressed BDDs.
//     Proceedings of the 31st annual Design Automation Conference, pp. 420-424.

kyama

ruby -e ' (1..9).to_a.permutation(9).each {|v| if (v[0]*10 + v[1])*(v[2]*10+v[3])*v[4]==v[5]*(v[6]*10+v[7])*v[8];puts v.join(" ");end;}'

kyama

#
# k means clustering
#
# https://gist.github.com/kyama/5171166
#
# Date:: 2013.03.15
#
class Kmeans
  
  def initialize seed=1234,size=100,max_value=5000,cluster_size=50

kyama

ruby -r 'digest/sha1' -e 'puts Digest::SHA1.hexdigest(File.open("<FILENAME>", "rb").read)'

kyama

ruby -e 'puts (0..11).collect {|e| (300.0/11.0*e).truncate%60}.join(",")'