From: Rong <ron.green@...>
Date: 2008-08-30T15:21:58+09:00
Subject: Re: array#push

I get it. Boy, was my stupid light lit or what?

On Aug 30, 1:14 am, "Michael Fellinger" <m.fellin...@gmail.com> wrote:
> On Sat, Aug 30, 2008 at 3:02 PM, Ron Green <ron.gr...@gmail.com> wrote:
> > Given the foloowing code:
> > class Person
> >  attr_accessor :first_name, :middle_name, :last_name
> >  def whole_name
> >    n = first_name + " "
> >    n << "#{middle_name} " if middle_name
> >    n << last_name
> >    return n.size
> >  end
> > end
>
> > m = Person.new
> > m.first_name = "Sam"
> > m.middle_name = "Ray"
> > m.last_name = "Smith"
>
> > x = m.whole_name
>
> > puts x
>
> > Why is x =13 instead of 3?
>
> You are asking about Array#push, yet not using it. If you would try to
> replace '<<' with '.push' you would see that instead you are handling
> Strings.
>
> irb(main):001:0> a = 'Sam'
> => "Sam"
> irb(main):002:0> a << ' Ray'
> => "Sam Ray"
> irb(main):003:0> a = ['Sam']
> => ["Sam"]
> irb(main):004:0> a << 'Ray'
> => ["Sam", "Ray"]
> irb(main):005:0> a = 'Sam'
> => "Sam"
> irb(main):006:0> a.push('Ray')
> NoMethodError: undefined method `push' for "Sam":String
>         from (irb):6
> irb(main):007:0> a = ['Sam']
> => ["Sam"]
> irb(main):008:0> a.push('Ray')
> => ["Sam", "Ray"]
>
>
>
> > --
> > ron.gr...@gmail.com