I check the attr_ topic but
i am a little lost when is speak about the attr_writer...
I know attr_accessor permit to change data in game
and
attr_reader serve for force a reading of a specific data
but I don't know what is the use of attr_writer
I hope people will can help me :3!
The utility of attr_writer
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For short:
attr_reader :value creates a method to read an attributes value, attr_writer :value creates a method to change an attributes value and attr_accessor :value creates both of these methods.
I usually use attr_writer instead of attr_accessor when I want to redefine the corresponding read-method anyway, for example to lazily initialize an attribute:
Code:attr_writer :value def value return defined?(@value) ? @value : 0end -
Ho so easy I never knew attr_accessor do both...For short:
attr_reader :value creates a method to read an attributes value, attr_writer :value creates a method to change an attributes value and attr_accessor :value creates both of these methods. -
You would use attr_writer if you had an internal class member you wanted outside users only to modify, but not read.
I rarely use it, myself. Most often, I use attr_accessor or attr_reader.
Basically, attr_reader creates a function like this:
def var_name
var_name
end
Attr_writer creates a function like this (I may have this syntax wrong):
def var_name=(new_value)
@var_name=new_value
end
Attr_accessor creates both functions. -
Ho thanks this is more clear so the attr_writer don't have really ''use'' in it I never saw someone using it ...You would use attr_writer if you had an internal class member you wanted outside users only to modify, but not read.
I rarely use it, myself. Most often, I use attr_accessor or attr_reader.
Basically, attr_reader creates a function like this:
def var_name
var_name
end
Attr_writer creates a function like this (I may have this syntax wrong):
def var_name=(new_value)
@var_name=new_value
end
Attr_accessor creates both functions. -
Yeah in custom script RGSS3, why not do attr_accessor instead of attr_writer, it's your custom script so you should have full authority about all things inside your script. =)Ho thanks this is more clear so the attr_writer don't have really ''use'' in it I never saw someone using it ...