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@kkosuge
Created April 5, 2012 13:48
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@n_map = { 1 => "0", 2 => "1", 3 => "2", 4 => "3", 5 => "4", 6 => "5",
7 => "6", 8 => "7", 9 => "8", 10 => "9", 11 => "a", 12 => "b",
13 => "c", 14 => "d", 15 => "e", 16 => "f", 17 => "g", 18 => "h",
19 => "i", 20 => "j", 21 => "k", 22 => "l", 23 => "m", 24 => "n",
25 => "o", 26 => "p", 27 => "q", 28 => "r", 29 => "s", 30 => "t",
31 => "u", 32 => "v", 33 => "w", 34 => "x", 35 => "y", 36 => "z",
37 => "A", 38 => "B", 39 => "C", 40 => "D", 41 => "E", 42 => "F",
43 => "G", 44 => "H", 45 => "I", 46 => "J", 47 => "K", 48 => "L",
49 => "M", 50 => "N", 51 => "O", 52 => "P", 53 => "Q", 54 => "R",
55 => "S", 56 => "T", 57 => "U", 58 => "V", 59 => "W", 60 => "X",
61 => "Y", 62 => "Z" }
def convert62(i)
digit = []
begin
i, c = i.divmod(62)
digit << @n_map[c+1]
end while i > 0
return digit.reverse.join('')
end
puts convert62(123456) #=> "w7e"
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