From: Brian Candler <b.candler@...>
Date: 2010-08-01T20:30:47+09:00
Subject: Re: Beginner help needed: use a class def to create new instance

Steve P. wrote:
> class Character
>   attr_reader :chname, :chnick, :chquote
>   def initialize(chname,chnick)
>     @chname=chname
>     @chnick=chnick
>     @chquote=String.new
>   end
>   def addquote(quote)
>     @chquote=quote if quote.length > 10
>   end
>   def promptedinput
>     print "Char name:    ";chname=gets.chomp
>     print "Char Nick:    ";chnick=gets.chomp
>     print "Char Quote:          ";chquote=gets.chomp
>     # Need help here!
>                 # What code goes here to add Character class instance?
>     # class instance name should be newchar
>   end
> end

I think you want a class method, not an instance method, since you're 
creating a new object which doesn't have any relation to any existing 
object.

class Character
  def initialize(chname,chnick,chquote="")
    @chname=chname
    @chnick=chnick
    @chquote=chquote
  end
  def self.promptedinput
    print "Char name:    ";chname=gets.chomp
    print "Char Nick:    ";chnick=gets.chomp
    print "Char Quote:   ";chquote=gets.chomp
    new(chnam,chnick,chquote)
  end
end

newchar = Character.promptedinput
puts newchar.inspect

Note that I modified your initialize method to accept chquote as an 
optional third argument. If you don't want to do that, then::

  def self.promptedinput
    print "Char name:    ";chname=gets.chomp
    print "Char Nick:    ";chnick=gets.chomp
    print "Char Quote:   ";chquote=gets.chomp
    result = new(chname,chnick)
    result.chquote = chquote
    result
  end
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