Created
October 13, 2017 16:46
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# 13日の金曜日って多めに出現するのかなって言ってた人が居たので調べたら、そんな事なかった。 | |
# 逆に満遍なく曜日と日付が周期していてちょっと驚いたかも | |
# 29、30、31日の追加で上手く調整しているんだなぁ。って改めて思った。 | |
require 'date' | |
hash = Hash.new(0) | |
(Date.new(1990,1,1)..Date.new(2017,12,31)).each do |t| | |
hash[[t.strftime('%a') , t.day ]]+=1 | |
end | |
p hash[['Fri',13]] | |
p Hash[ hash.sort_by{ |_, v| -v } ] |
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