From: Rob <rpb6@...>
Date: 2007-09-12T01:29:23+09:00
Subject: Re: undefined method `+' for nil:NilClass (NoMeth

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The succ! operator for String class should do the trick

char = "a"
52.times do
  puts char
  char.succ!
end


** Alternatively as a class

class Generator
  def initialize(start="a", limit=52)
    @limit = limit
    @start = start
  end

  def each
    char = @start
    @limit.times do
      yield char
      char.succ!
    end
  end
end

gen = Generator.new

gen.each { |code| puts code }

-- Rob

Mahen Surinam wrote:
> Dear All,
>
> Am trying to create a character generator in RUBY. it will create
> characters from a-z in the folowing way:
>
> a
> b
> c
> z
> aa
> ab
> ac
>
> and so on. sor here is my first code:
>
>
> Array = ['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']
>
> $Text = "";
> $OldText = "";
> $OldText2 = ""
> $OldText3 = ""
>
> def Join()
>  $Text = $Oldtext3 + $OldText2 + $OldText + $JOB
> end
>
> while (1)
> Array.each do |$JOB|
> Join()
>  puts $Text
> end
> end
>
>
>
> Eventually, $oldtext2-3 will be filled in later, bt am geting this
> error:
>
> C:/WINDOWS/thread.rb:10:in `Join': undefined method `+' for nil:NilClass
> (NoMeth
> odError)
>         from C:/WINDOWS/thread.rb:15
>         from C:/WINDOWS/thread.rb:14:in `each'
>         from C:/WINDOWS/thread.rb:14
>
> C:\WINDOWS>
>
>
>
>
>
> Could someone please shed some light
>   

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