Instance variables

[Justin To]

class Trie
attr_reader :value, arent, :child_node
def initialize(value=nil, parent=nil)
@value = value
@children = {}
@parent = parent
@child_node = @children # ??? HERE
end
end

# ??? HERE: Does it matter if I do @child_node = children (without the @
for children)? What's the difference with using the @ and not?

Thank you!!

 

[Avdi Grimm]

# ??? HERE: Does it matter if I do @child_node = children (without the @
for children)? What's the difference with using the @ and not?

Since you haven't defined an attr_reader for @children, you have to
use the instance variable (@).

--
Avdi

Home: http://avdi.org
Developer Blog: http://avdi.org/devblog/
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[Kevin Compton]

[Note: parts of this message were removed to make it a legal post.]

# ??? HERE: Does it matter if I do @child_node = children (without the @
for children)? What's the difference with using the @ and not?

It depends on your intent with the variable children. If it is just a
temporary variable that you want to use while generating the @child_node
value then it is fine not to have the '@'

Kevin

 

[Avdi Grimm]

It depends on your intent with the variable children. If it is just a
temporary variable that you want to use while generating the @child_node
value then it is fine not to have the '@'

Hi Kevin

Good catch. I think I missed the point of the OP's question.

--
Avdi

Home: http://avdi.org
Developer Blog: http://avdi.org/devblog/
Twitter: http://twitter.com/avdi
Journal: http://avdi.livejournal.com

 

[Justin To]

Great, thanks. So what if I DID specify attr_reader :children, but still
did @child_node = @children. Would that have any adverse effects?

Thanks!

 

[Robert Dober]

Great, thanks. So what if I DID specify attr_reader :children, but still
did @child_node = @children. Would that have any adverse effects?

No the parser identifies @children as an instance variable.
R