How to access variable from outside class in another file









up vote
2
down vote

favorite












My file structure is as follows:



Main/
Games/
roulette.rb
casino.rb
wallet.rb
player.rb


I have a wallet class that holds a money value in the class like so.



class Wallet
attr_accessor :money
def initialize
@money = 0
end
end


I then have a player class that inherits from the Wallet class



class Player < Wallet

attr_accessor :name
def initialize
super()
@name = nil
get_user_info
end


I then have a Casino class that inherits from Player like so



class Casino < Player
def initialize
binding.pry
puts @money, @name
end


I have also used require_relative to pull in both files thinking that would give me access to their global variables @money, @name.



If I am inside the roulette.rb file here is my code I wrote just to see if it would have a value.



require_relative '../wallet.rb'

class Roulette
def initialize
puts @wallet
end
end


How would I go about getting access to these variables in the casino class? Thanks for the help.










share|improve this question



















  • 1




    Ok sorry, edited the original
    – Daniel Bailey
    Nov 11 at 16:45






  • 1




    Aside from your actual question, this seems like a major misuse of inheritance. If class A inherits from class B, then it should make sense to say "A is a type of B". In this case, is a Player a type of Wallet? No. Is a Casino a type of Player? No. I'd advise rethinking your class architecture.
    – Tom Lord
    Nov 11 at 17:19











  • Yea so wallet inherits from player, and casino inherits from player, so I just called super from casino to instantiate each class. Which creates the wallet.
    – Daniel Bailey
    Nov 11 at 17:20






  • 1




    @DanielBailey "which creates the wallet" - again, not quite. "casino = Casino.new". This casino is a casino and a player and a wallet, all three in the same single object. I agree with Tom Lord, this is a misuse of inheritance. There's no chance this is needed in your app
    – Sergio Tulentsev
    Nov 11 at 17:33















up vote
2
down vote

favorite












My file structure is as follows:



Main/
Games/
roulette.rb
casino.rb
wallet.rb
player.rb


I have a wallet class that holds a money value in the class like so.



class Wallet
attr_accessor :money
def initialize
@money = 0
end
end


I then have a player class that inherits from the Wallet class



class Player < Wallet

attr_accessor :name
def initialize
super()
@name = nil
get_user_info
end


I then have a Casino class that inherits from Player like so



class Casino < Player
def initialize
binding.pry
puts @money, @name
end


I have also used require_relative to pull in both files thinking that would give me access to their global variables @money, @name.



If I am inside the roulette.rb file here is my code I wrote just to see if it would have a value.



require_relative '../wallet.rb'

class Roulette
def initialize
puts @wallet
end
end


How would I go about getting access to these variables in the casino class? Thanks for the help.










share|improve this question



















  • 1




    Ok sorry, edited the original
    – Daniel Bailey
    Nov 11 at 16:45






  • 1




    Aside from your actual question, this seems like a major misuse of inheritance. If class A inherits from class B, then it should make sense to say "A is a type of B". In this case, is a Player a type of Wallet? No. Is a Casino a type of Player? No. I'd advise rethinking your class architecture.
    – Tom Lord
    Nov 11 at 17:19











  • Yea so wallet inherits from player, and casino inherits from player, so I just called super from casino to instantiate each class. Which creates the wallet.
    – Daniel Bailey
    Nov 11 at 17:20






  • 1




    @DanielBailey "which creates the wallet" - again, not quite. "casino = Casino.new". This casino is a casino and a player and a wallet, all three in the same single object. I agree with Tom Lord, this is a misuse of inheritance. There's no chance this is needed in your app
    – Sergio Tulentsev
    Nov 11 at 17:33













up vote
2
down vote

favorite









up vote
2
down vote

favorite











My file structure is as follows:



Main/
Games/
roulette.rb
casino.rb
wallet.rb
player.rb


I have a wallet class that holds a money value in the class like so.



class Wallet
attr_accessor :money
def initialize
@money = 0
end
end


I then have a player class that inherits from the Wallet class



class Player < Wallet

attr_accessor :name
def initialize
super()
@name = nil
get_user_info
end


I then have a Casino class that inherits from Player like so



class Casino < Player
def initialize
binding.pry
puts @money, @name
end


I have also used require_relative to pull in both files thinking that would give me access to their global variables @money, @name.



If I am inside the roulette.rb file here is my code I wrote just to see if it would have a value.



require_relative '../wallet.rb'

class Roulette
def initialize
puts @wallet
end
end


How would I go about getting access to these variables in the casino class? Thanks for the help.










share|improve this question















My file structure is as follows:



Main/
Games/
roulette.rb
casino.rb
wallet.rb
player.rb


I have a wallet class that holds a money value in the class like so.



class Wallet
attr_accessor :money
def initialize
@money = 0
end
end


I then have a player class that inherits from the Wallet class



class Player < Wallet

attr_accessor :name
def initialize
super()
@name = nil
get_user_info
end


I then have a Casino class that inherits from Player like so



class Casino < Player
def initialize
binding.pry
puts @money, @name
end


I have also used require_relative to pull in both files thinking that would give me access to their global variables @money, @name.



If I am inside the roulette.rb file here is my code I wrote just to see if it would have a value.



require_relative '../wallet.rb'

class Roulette
def initialize
puts @wallet
end
end


How would I go about getting access to these variables in the casino class? Thanks for the help.







ruby






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 11 at 16:45

























asked Nov 11 at 16:29









Daniel Bailey

6710




6710







  • 1




    Ok sorry, edited the original
    – Daniel Bailey
    Nov 11 at 16:45






  • 1




    Aside from your actual question, this seems like a major misuse of inheritance. If class A inherits from class B, then it should make sense to say "A is a type of B". In this case, is a Player a type of Wallet? No. Is a Casino a type of Player? No. I'd advise rethinking your class architecture.
    – Tom Lord
    Nov 11 at 17:19











  • Yea so wallet inherits from player, and casino inherits from player, so I just called super from casino to instantiate each class. Which creates the wallet.
    – Daniel Bailey
    Nov 11 at 17:20






  • 1




    @DanielBailey "which creates the wallet" - again, not quite. "casino = Casino.new". This casino is a casino and a player and a wallet, all three in the same single object. I agree with Tom Lord, this is a misuse of inheritance. There's no chance this is needed in your app
    – Sergio Tulentsev
    Nov 11 at 17:33













  • 1




    Ok sorry, edited the original
    – Daniel Bailey
    Nov 11 at 16:45






  • 1




    Aside from your actual question, this seems like a major misuse of inheritance. If class A inherits from class B, then it should make sense to say "A is a type of B". In this case, is a Player a type of Wallet? No. Is a Casino a type of Player? No. I'd advise rethinking your class architecture.
    – Tom Lord
    Nov 11 at 17:19











  • Yea so wallet inherits from player, and casino inherits from player, so I just called super from casino to instantiate each class. Which creates the wallet.
    – Daniel Bailey
    Nov 11 at 17:20






  • 1




    @DanielBailey "which creates the wallet" - again, not quite. "casino = Casino.new". This casino is a casino and a player and a wallet, all three in the same single object. I agree with Tom Lord, this is a misuse of inheritance. There's no chance this is needed in your app
    – Sergio Tulentsev
    Nov 11 at 17:33








1




1




Ok sorry, edited the original
– Daniel Bailey
Nov 11 at 16:45




Ok sorry, edited the original
– Daniel Bailey
Nov 11 at 16:45




1




1




Aside from your actual question, this seems like a major misuse of inheritance. If class A inherits from class B, then it should make sense to say "A is a type of B". In this case, is a Player a type of Wallet? No. Is a Casino a type of Player? No. I'd advise rethinking your class architecture.
– Tom Lord
Nov 11 at 17:19





Aside from your actual question, this seems like a major misuse of inheritance. If class A inherits from class B, then it should make sense to say "A is a type of B". In this case, is a Player a type of Wallet? No. Is a Casino a type of Player? No. I'd advise rethinking your class architecture.
– Tom Lord
Nov 11 at 17:19













Yea so wallet inherits from player, and casino inherits from player, so I just called super from casino to instantiate each class. Which creates the wallet.
– Daniel Bailey
Nov 11 at 17:20




Yea so wallet inherits from player, and casino inherits from player, so I just called super from casino to instantiate each class. Which creates the wallet.
– Daniel Bailey
Nov 11 at 17:20




1




1




@DanielBailey "which creates the wallet" - again, not quite. "casino = Casino.new". This casino is a casino and a player and a wallet, all three in the same single object. I agree with Tom Lord, this is a misuse of inheritance. There's no chance this is needed in your app
– Sergio Tulentsev
Nov 11 at 17:33





@DanielBailey "which creates the wallet" - again, not quite. "casino = Casino.new". This casino is a casino and a player and a wallet, all three in the same single object. I agree with Tom Lord, this is a misuse of inheritance. There's no chance this is needed in your app
– Sergio Tulentsev
Nov 11 at 17:33













1 Answer
1






active

oldest

votes

















up vote
1
down vote



accepted










Those are not global variables. They are called "instance variables" and to access them you need to create instances of your casinos and players. Looks like this.



player = Player.new
player.money # => 0
player.money += 10
player.money # => 10


In your Casino class you don't call parent initializers (a simple oversight, I think), so it doesn't initialize @name and @money.



And Roulette doesn't do anything at all to obtain a wallet. So it stays at default value nil.






share|improve this answer




















  • yea JS lingo I can't drop ha. Ok so I am creating an instance of the wallet inside of the player, and creating an instance of the casino inside of the player. How would I get access to those instance variables inside of casino?
    – Daniel Bailey
    Nov 11 at 16:50










  • @DanielBailey: "I am creating an instance of the wallet inside of the player" - no you don't. In your hierarchy a casino IS a player, which is ALSO a wallet. Doesn't make any sense, right? :)
    – Sergio Tulentsev
    Nov 11 at 16:52











  • yea I'm so lost. Only a week in learning ruby, so struggling with how each class inherits what. Guess I need to do more reading
    – Daniel Bailey
    Nov 11 at 16:53






  • 1




    @DanielBailey: "How would I get access to those instance variables inside of casino" - call super in casino's initializer, this should set name/money.
    – Sergio Tulentsev
    Nov 11 at 16:53






  • 1




    @DanielBailey: yeah, JS object model does that to people :) Look up a book called "practical object-oriented design in ruby" (AKA POODR). It's excellent. Might be overwhelming at first (at your skill level), but on a second or third read you'll get a level-up, guaranteed :)
    – Sergio Tulentsev
    Nov 11 at 16:54











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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

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active

oldest

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active

oldest

votes








up vote
1
down vote



accepted










Those are not global variables. They are called "instance variables" and to access them you need to create instances of your casinos and players. Looks like this.



player = Player.new
player.money # => 0
player.money += 10
player.money # => 10


In your Casino class you don't call parent initializers (a simple oversight, I think), so it doesn't initialize @name and @money.



And Roulette doesn't do anything at all to obtain a wallet. So it stays at default value nil.






share|improve this answer




















  • yea JS lingo I can't drop ha. Ok so I am creating an instance of the wallet inside of the player, and creating an instance of the casino inside of the player. How would I get access to those instance variables inside of casino?
    – Daniel Bailey
    Nov 11 at 16:50










  • @DanielBailey: "I am creating an instance of the wallet inside of the player" - no you don't. In your hierarchy a casino IS a player, which is ALSO a wallet. Doesn't make any sense, right? :)
    – Sergio Tulentsev
    Nov 11 at 16:52











  • yea I'm so lost. Only a week in learning ruby, so struggling with how each class inherits what. Guess I need to do more reading
    – Daniel Bailey
    Nov 11 at 16:53






  • 1




    @DanielBailey: "How would I get access to those instance variables inside of casino" - call super in casino's initializer, this should set name/money.
    – Sergio Tulentsev
    Nov 11 at 16:53






  • 1




    @DanielBailey: yeah, JS object model does that to people :) Look up a book called "practical object-oriented design in ruby" (AKA POODR). It's excellent. Might be overwhelming at first (at your skill level), but on a second or third read you'll get a level-up, guaranteed :)
    – Sergio Tulentsev
    Nov 11 at 16:54















up vote
1
down vote



accepted










Those are not global variables. They are called "instance variables" and to access them you need to create instances of your casinos and players. Looks like this.



player = Player.new
player.money # => 0
player.money += 10
player.money # => 10


In your Casino class you don't call parent initializers (a simple oversight, I think), so it doesn't initialize @name and @money.



And Roulette doesn't do anything at all to obtain a wallet. So it stays at default value nil.






share|improve this answer




















  • yea JS lingo I can't drop ha. Ok so I am creating an instance of the wallet inside of the player, and creating an instance of the casino inside of the player. How would I get access to those instance variables inside of casino?
    – Daniel Bailey
    Nov 11 at 16:50










  • @DanielBailey: "I am creating an instance of the wallet inside of the player" - no you don't. In your hierarchy a casino IS a player, which is ALSO a wallet. Doesn't make any sense, right? :)
    – Sergio Tulentsev
    Nov 11 at 16:52











  • yea I'm so lost. Only a week in learning ruby, so struggling with how each class inherits what. Guess I need to do more reading
    – Daniel Bailey
    Nov 11 at 16:53






  • 1




    @DanielBailey: "How would I get access to those instance variables inside of casino" - call super in casino's initializer, this should set name/money.
    – Sergio Tulentsev
    Nov 11 at 16:53






  • 1




    @DanielBailey: yeah, JS object model does that to people :) Look up a book called "practical object-oriented design in ruby" (AKA POODR). It's excellent. Might be overwhelming at first (at your skill level), but on a second or third read you'll get a level-up, guaranteed :)
    – Sergio Tulentsev
    Nov 11 at 16:54













up vote
1
down vote



accepted







up vote
1
down vote



accepted






Those are not global variables. They are called "instance variables" and to access them you need to create instances of your casinos and players. Looks like this.



player = Player.new
player.money # => 0
player.money += 10
player.money # => 10


In your Casino class you don't call parent initializers (a simple oversight, I think), so it doesn't initialize @name and @money.



And Roulette doesn't do anything at all to obtain a wallet. So it stays at default value nil.






share|improve this answer












Those are not global variables. They are called "instance variables" and to access them you need to create instances of your casinos and players. Looks like this.



player = Player.new
player.money # => 0
player.money += 10
player.money # => 10


In your Casino class you don't call parent initializers (a simple oversight, I think), so it doesn't initialize @name and @money.



And Roulette doesn't do anything at all to obtain a wallet. So it stays at default value nil.







share|improve this answer












share|improve this answer



share|improve this answer










answered Nov 11 at 16:48









Sergio Tulentsev

178k29288304




178k29288304











  • yea JS lingo I can't drop ha. Ok so I am creating an instance of the wallet inside of the player, and creating an instance of the casino inside of the player. How would I get access to those instance variables inside of casino?
    – Daniel Bailey
    Nov 11 at 16:50










  • @DanielBailey: "I am creating an instance of the wallet inside of the player" - no you don't. In your hierarchy a casino IS a player, which is ALSO a wallet. Doesn't make any sense, right? :)
    – Sergio Tulentsev
    Nov 11 at 16:52











  • yea I'm so lost. Only a week in learning ruby, so struggling with how each class inherits what. Guess I need to do more reading
    – Daniel Bailey
    Nov 11 at 16:53






  • 1




    @DanielBailey: "How would I get access to those instance variables inside of casino" - call super in casino's initializer, this should set name/money.
    – Sergio Tulentsev
    Nov 11 at 16:53






  • 1




    @DanielBailey: yeah, JS object model does that to people :) Look up a book called "practical object-oriented design in ruby" (AKA POODR). It's excellent. Might be overwhelming at first (at your skill level), but on a second or third read you'll get a level-up, guaranteed :)
    – Sergio Tulentsev
    Nov 11 at 16:54

















  • yea JS lingo I can't drop ha. Ok so I am creating an instance of the wallet inside of the player, and creating an instance of the casino inside of the player. How would I get access to those instance variables inside of casino?
    – Daniel Bailey
    Nov 11 at 16:50










  • @DanielBailey: "I am creating an instance of the wallet inside of the player" - no you don't. In your hierarchy a casino IS a player, which is ALSO a wallet. Doesn't make any sense, right? :)
    – Sergio Tulentsev
    Nov 11 at 16:52











  • yea I'm so lost. Only a week in learning ruby, so struggling with how each class inherits what. Guess I need to do more reading
    – Daniel Bailey
    Nov 11 at 16:53






  • 1




    @DanielBailey: "How would I get access to those instance variables inside of casino" - call super in casino's initializer, this should set name/money.
    – Sergio Tulentsev
    Nov 11 at 16:53






  • 1




    @DanielBailey: yeah, JS object model does that to people :) Look up a book called "practical object-oriented design in ruby" (AKA POODR). It's excellent. Might be overwhelming at first (at your skill level), but on a second or third read you'll get a level-up, guaranteed :)
    – Sergio Tulentsev
    Nov 11 at 16:54
















yea JS lingo I can't drop ha. Ok so I am creating an instance of the wallet inside of the player, and creating an instance of the casino inside of the player. How would I get access to those instance variables inside of casino?
– Daniel Bailey
Nov 11 at 16:50




yea JS lingo I can't drop ha. Ok so I am creating an instance of the wallet inside of the player, and creating an instance of the casino inside of the player. How would I get access to those instance variables inside of casino?
– Daniel Bailey
Nov 11 at 16:50












@DanielBailey: "I am creating an instance of the wallet inside of the player" - no you don't. In your hierarchy a casino IS a player, which is ALSO a wallet. Doesn't make any sense, right? :)
– Sergio Tulentsev
Nov 11 at 16:52





@DanielBailey: "I am creating an instance of the wallet inside of the player" - no you don't. In your hierarchy a casino IS a player, which is ALSO a wallet. Doesn't make any sense, right? :)
– Sergio Tulentsev
Nov 11 at 16:52













yea I'm so lost. Only a week in learning ruby, so struggling with how each class inherits what. Guess I need to do more reading
– Daniel Bailey
Nov 11 at 16:53




yea I'm so lost. Only a week in learning ruby, so struggling with how each class inherits what. Guess I need to do more reading
– Daniel Bailey
Nov 11 at 16:53




1




1




@DanielBailey: "How would I get access to those instance variables inside of casino" - call super in casino's initializer, this should set name/money.
– Sergio Tulentsev
Nov 11 at 16:53




@DanielBailey: "How would I get access to those instance variables inside of casino" - call super in casino's initializer, this should set name/money.
– Sergio Tulentsev
Nov 11 at 16:53




1




1




@DanielBailey: yeah, JS object model does that to people :) Look up a book called "practical object-oriented design in ruby" (AKA POODR). It's excellent. Might be overwhelming at first (at your skill level), but on a second or third read you'll get a level-up, guaranteed :)
– Sergio Tulentsev
Nov 11 at 16:54





@DanielBailey: yeah, JS object model does that to people :) Look up a book called "practical object-oriented design in ruby" (AKA POODR). It's excellent. Might be overwhelming at first (at your skill level), but on a second or third read you'll get a level-up, guaranteed :)
– Sergio Tulentsev
Nov 11 at 16:54


















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