From: Gijs Nijholt <gijs.nijholt@...>
Date: 2006-10-21T07:14:49+09:00
Subject: Re: multi dim array?

hm, tried several things with detect() and they all gave a nil error 
when least expected error..
so I thought maybe I need to switch to Hash instead of Array?

excuse me for posting the entire function, but this is what I've made of 
it:

  def translate_to_braille(msg)
    #braille_alphabet =  [ ["a","⠁"], ["b","⠃"], ["c","⠉"], ["d","⠙"], 
["e","⠑"], ["f","⠋"], ["g","⠛"], ["h","⠓"], ["i","⠊"], ["j","⠚"], ["k", 
"⠅"], ["l","⠇"], ["m","⠍"], ["n","⠝"], ["o","⠕"], ["p","⠏"], ["q","⠟"], 
["r","⠗"], ["s","⠎"], ["t","⠞"], ["u","⠥"], ["v","⠧"], ["w","⠺"], 
["x","⠭"], ["y","⠽"], ["z","⠵"], [" ", " "] ]
    braille_alphabet =  { "a"=>"⠁", "b"=>"⠃", "c"=>"⠉", "d"=>"⠙", 
"e"=>"⠑", "f"=>"⠋", "g"=>"⠛", "h"=>"⠓", "i"=>"⠊", "j"=>"⠚", "k"=>"⠅", 
"l"=>"⠇", "m"=>"⠍", "n"=>"⠝", "o"=>"⠕", "p"=>"⠏", "q"=>"⠟", "r"=>"⠗", 
"s"=>"⠎", "t"=>"⠞", "u"=>"⠥", "v"=>"⠧", "w"=>"⠺", "x"=>"⠭", "y"=>"⠽", 
"z"=>"⠵", " "=>" " }
    #msg.split(//).inject("") { |result, char| result += 
braille_alphabet.first  }
    msg.split(//).inject("") { |result, char|
      result += char + " " + braille_alphabet["r"]
    }
  end

the braille_alphabet["r"] nicely gives it's value, but when I replace it 
with braille_alphabet[char] Ruby says:
can't convert nil into String

why?
char is not nil, because when I print it, it contains a character..


Wilson Bilkovich wrote:
> On 10/20/06, Gijs Nijholt <gijs.nijholt@gmail.com> wrote:
>> end
>>
> Does:
> some_alphabet.detect {|e| e == "c"}[1]
> ..do what you're looking for?


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