XY-Sort

STDOUT.syncとreduceブロック以外は変数使わずに書けました

hena7pre.rb

#!/usr/bin/env ruby
#http://qiita.com/Nabetani/items/7b08b0eb9ef84d7cfe49
#http://nabetani.sakura.ne.jp/hena/ord7xysort/
STDOUT.sync=true
class Array
    def stable_sort(idx)
        sort_by.with_index{|s,i|[s[idx],i]}
    end
end
A=[
    [4,1,4,2,1,3],
    [7,3,2,0,5,0],
    [2,3,6,0,6,7],
    [6,4,5,7,5,1],
    [3,1,6,6,2,4],
    [6,0,5,5,5,1],
]
F={
    'u'=>lambda{|a|a.stable_sort(0)},
    'v'=>lambda{|a|a.stable_sort(1)},
    'w'=>lambda{|a|a.stable_sort(2)},
    'x'=>lambda{|a|a.stable_sort(3)},
    'y'=>lambda{|a|a.stable_sort(4)},
    'z'=>lambda{|a|a.stable_sort(5)},

    'A'=>lambda{|a|a.transpose.stable_sort(0).transpose},
    'B'=>lambda{|a|a.transpose.stable_sort(1).transpose},
    'C'=>lambda{|a|a.transpose.stable_sort(2).transpose},
    'D'=>lambda{|a|a.transpose.stable_sort(3).transpose},
    'E'=>lambda{|a|a.transpose.stable_sort(4).transpose},
    'F'=>lambda{|a|a.transpose.stable_sort(5).transpose},
}
while gets
    puts $_.chomp.chars.reduce(A){|s,e|s=F[e][s]}[0]*''
end