Class struggle

spireup

Hi

Im very new and struggling to access my first lot of class definitions.

Ive scoured some online books but cant find the error. Can anyone spot the problem

class Widget
def initialize(xPos, yPos, zPos)
@xPos = xPos
@yPos = yPos
@zPos = zPos
end
end

myW= Widget.new(1.1,0,8)
puts myW.inspect
puts myW.xPos

The inspect works fine but i cant access the attributes.

Thanks

Paul

thomthom

You haven't defined any attributes. You just define instance variables.

<span class="syntaxdefault"><br />class Widget<br /><br />  attr_accessor</span><span class="syntaxkeyword">(</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">;</span><span class="syntaxdefault">xPos</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">;</span><span class="syntaxdefault">yPos</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">;</span><span class="syntaxdefault">zPos </span><span class="syntaxkeyword">)<br /><br /></span><span class="syntaxdefault">  def initialize</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">xPos</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> yPos</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> zPos</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">    </span><span class="syntaxkeyword">@</span><span class="syntaxdefault">xPos </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> xPos<br />    </span><span class="syntaxkeyword">@</span><span class="syntaxdefault">yPos </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> yPos<br />    </span><span class="syntaxkeyword">@</span><span class="syntaxdefault">zPos </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> zPos<br />  end<br /><br />end<br /><br />myW</span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> Widget</span><span class="syntaxkeyword">.new(</span><span class="syntaxdefault">1.1</span><span class="syntaxkeyword">,</span><span class="syntaxdefault">0</span><span class="syntaxkeyword">,</span><span class="syntaxdefault">8</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">puts myW</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">inspect<br />puts myW</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">xPos<br /></span>

thomthom

<span class="syntaxdefault"><br />class Foo<br />  attr_accessor</span><span class="syntaxkeyword">(</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">;</span><span class="syntaxdefault">bar </span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">end<br /></span>

is the same as

<span class="syntaxdefault"><br />class Foo<br />&nbsp;&nbsp;</span><span class="syntaxcomment">#&nbsp;Getter<br /></span><span class="syntaxdefault">  def bar<br />    </span><span class="syntaxkeyword">@</span><span class="syntaxdefault">bar<br />  end<br />&nbsp;&nbsp;</span><span class="syntaxcomment">#&nbsp;Setter<br /></span><span class="syntaxdefault">  def bar</span><span class="syntaxkeyword">=(</span><span class="syntaxdefault"> new_value </span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">    </span><span class="syntaxkeyword">@</span><span class="syntaxdefault">bar </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> new_value<br />  end<br />end<br /></span>

spireup

ThomThom

thanks so much!

Paul