From: Robert Klemme <bob.news@...>
Date: 2005-04-14T03:24:38+09:00
Subject: Re: newbie question re: variable assignment


"Trans" <transfire@gmail.com> schrieb im Newsbeitrag 
news:1113415954.205046.176340@z14g2000cwz.googlegroups.com...
> Hi--
> Dont; worry this is a low bite board :-)
>
>> Why doesn't this work?
>>
>> 1.upto(9) do |x|
>>       puts ?#{x}
>> end
>
> Well, its cuz you're trying to do string interpolation directly into
> ruby code, which can't be done. The interpolation (i.e. #{x}) only
> works in strings. Secondly, the ? is a literal form and not a method,
> so you can;t pass it arguments. To get the ascii value of a string use
> str[n] where n is the index of the character you wish to convert, in
> this case 0.
>
>  1.upto(9) do |x|
>        puts "#{x}"[0]
>  end

or

1.upto(9) do |x|
  puts x.to_s[0]
end

or (with some knowledge of ASCII characterset)

1.upto(9) do |x|
  puts ?0 + x
end

> BTW, I believe this will change in future verions of Ruby since Ruby
> will be gaining more advanced encoding. So instead there will be a
> specific method, like String#ascii(n), or something, to do this.
> [Correct me if I am misinformed all.] But for now the above is the way.

Yeah probably.  But for the time being your solution works.

Kind regards

    robert