instance-variables Questions
5
Solved
I'm unsure of the Python convention for type hinting instance variables - I've been doing them within the __init__ constructor arguments like seen here:
class LoggedVar(Generic[T]):
def __init__(s...
Siamese asked 6/7, 2017 at 22:31
7
Solved
Here is some code:
class Person
def initialize(age)
@age = age
end
def age
@age
end
def age_difference_with(other_person)
(self.age - other_person.age).abs
end
protected :age
end
Wh...
Argumentative asked 7/11, 2009 at 14:37
2
"Access of shared member, constant member, enum member or nested type through an instance"
I wonder why Visual Studio is raising this warning:
Access of shared member, constant member, enum member or nested type through an instance
My code:
Dim a As ApplicationDeployment = deploym...
Filiano asked 13/3, 2014 at 11:37
3
Solved
If an instance variable belongs to a class, can I access the instance variable (e.g. @hello) directly using the class instance?
class Hello
def method1
@hello = "pavan"
end
end
h = Hello.new
p...
Procurable asked 25/8, 2012 at 14:15
5
Solved
I have a Ruby class. I want to get an instance variable from an argument to a method in that class. I can do get all of the instance variables as an array:
self.instance_variables
However, I wan...
Lew asked 13/5, 2010 at 21:15
3
I am really confused about the __dict__ attribute. I have searched a lot but still I am not sure about the output.
Could someone explain the use of this attribute from zero, in cases when it is us...
Whoa asked 11/11, 2013 at 13:20
7
Is there any way to make instance variables "private"(C++ or Java definition) in ruby? In other words I want following code to result in an error.
class Base
def initialize()
@x = 10
end
end
...
Clone asked 25/1, 2010 at 11:34
4
Solved
When I am creating a new class, should I set all instance attributes in __init__, even if they are None and in fact later assigned values in class methods?
See example below for the attribute...
Windpollinated asked 22/4, 2019 at 19:47
1
Below is my golang code. Each time validate method is called my compile method gets executed. I want to compile only once, not each time we call validate.
1) How to do it ?
2) My idea was to crea...
Ensoll asked 20/6, 2019 at 2:17
9
Solved
I'm implementing an object that is almost identical to a set, but requires an extra instance variable, so I am subclassing the built-in set object. What is the best way to make sure that the value ...
Coffer asked 28/4, 2009 at 15:5
6
Solved
What is the difference between a static and instance variable. The following sentence is what I cant get:
In certain cases, only one copy of a particular variable should be shared by all object...
Foreshore asked 18/1, 2014 at 13:12
12
Solved
Is there a built-in method in Python to get an array of all a class' instance variables? For example, if I have this code:
class hi:
def __init__(self):
self.ii = "foo"
self.kk = "bar"
Is the...
Grube asked 20/9, 2008 at 19:30
20
Solved
Let's say I have a Gift object with @name = "book" & @price = 15.95. What's the best way to convert that to the Hash {name: "book", price: 15.95} in Ruby, not Rails (although feel free to give ...
Perlite asked 17/2, 2011 at 14:56
8
Solved
I read When do Ruby instance variables get set? but I'm of two minds when to use class instance variables.
Class variables are shared by all objects of a class, Instance variables belong to one obj...
Tilth asked 2/4, 2013 at 20:17
3
Solved
I'm practicing lambda expressions in Java. I know local variables need to be final or effectively final according to the Oracle documentation for Java SE 16 Lambda Body :
Any local variable, forma...
Opposite asked 12/4, 2021 at 20:15
4
Solved
I apologize in advance with what will probably be a fairly easy/quick answer based on scope, but I've looked everywhere and am surprised to not come up with an answer.
I have created a class call...
Donley asked 9/9, 2012 at 1:46
3
Solved
I want to create an instance variable in a controller to be used in the view:
foo = "bar"
instance_variable_set("#{foo}", "cornholio")
In the view, use @bar so that:
@bar => "cornholio"
Th...
Heterocyclic asked 8/3, 2012 at 2:18
7
Solved
My questions concern instance variables that are initialized in methods outside the class constructor. This is for Python.
I'll first state what I understand:
Classes may define a constructor,...
Concordant asked 14/7, 2016 at 14:44
3
Solved
I was given a link to the official oracle documentation: https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html
where it is said:
Default Values
It's not always nece...
Insectile asked 18/10, 2019 at 14:18
15
Solved
Is there any advantage for either approach?
Example 1:
class A {
B b = new B();
}
Example 2:
class A {
B b;
A() {
b = new B();
}
}
Estray asked 3/1, 2010 at 6:53
2
Solved
I come from java background, so I am slightly confused here.
Consider the code snippet below:
class A():
def __init__(self, **kwargs):
self.obj_var = "I am obj var"
@classmethod
def ...
Lorentz asked 15/1, 2016 at 5:54
4
Solved
I have just tried to lint some code with Pylint, and the last remaining error is
R0902: too-many-instance-attributes (8/7)
I understand the rationale behind limiting the number of instance attri...
Sarcophagus asked 26/6, 2014 at 15:27
5
Solved
I'm having confusion in calling a non-static method
class A {
void doThis() {}
public static void main(String... arg) {
A a1 = new A();
a1.doThis(); // method - 1
new A().doThis(); // method...
Uriah asked 17/1, 2017 at 11:49
4
Solved
Is it possible to define properties that are only available to the class they are defined in, and that class's subclasses?
Stated another way, is there a way to define protected properties?
Paperback asked 24/11, 2010 at 7:9
6
Solved
I want to pass a default argument to an instance method using the value of an attribute of the instance:
class C:
def __init__(self, format):
self.format = format
def process(self, formatting=...
Jose asked 15/11, 2011 at 5:34
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