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How to override nested C++ objects methods?


How to override nested C++ objects methods?

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How to override nested C++ objects methods?
Tag : cpp , By : walkah
Date : January 02 2021, 06:48 AM


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passing this (the object) into one of the objects methods nested methods


Tag : javascript , By : Edwin
Date : March 29 2020, 07:55 AM
To fix the issue you can do Sorry for the long winded title, but I think it summaries my problem , Save this in a variable:
    this.setupOnlick = function(){ 
        var theObj = this;
        field.onlick = function(){//So how do I pass this (as in someObject) to this?
            theObj.log("Clicked!"); //As if I have written someObj.log("Clicked!");
        }
    }

Is there any way to override the double-underscore (magic) methods of arbitrary objects in Python?


Tag : python , By : user181706
Date : March 29 2020, 07:55 AM
This might help you As millimoose says, an implicit __foo__ call never goes through __getattribute__. The only thing you can do is actually add the appropriate functions to your wrapper class.
class Wrapper(object):
    def __init__(self, wrapped):
        self.wrapped = wrapped

    for dunder in ('__add__', '__sub__', '__len__', ...):
        locals()[dunder] = lambda self, __f=dunder, *args, **kwargs: getattr(self.wrapped, __f)(*args, **kwargs)

obj = [1,2,3]
w = Wrapper(obj)
print len(w)

Javascript objects with nested (internal) methods


Tag : javascript , By : Keniwan
Date : March 29 2020, 07:55 AM
I wish did fix the issue. You can set up a pointer to this that will match the parent in the main body of the constructor:
var that = this;
function setFullName() {
    that.fullName = givenName + " " + familyName;
    return;
}

Why not allowing subclasses to override methods can lead to creation of immutable objects?


Tag : java , By : msugar
Date : March 29 2020, 07:55 AM
like below fixes the issue Suppose String's methods could be extended by another class. There's no guarantee that the other class would be immutable like String is.
So if you call some library method and get a String back, will that String change or not? Is it the String base class or something that extended it that is mutable? String is a final class, so we don't have to worry about that.
public class WhyImmutableClassesShouldBeFinal {
    /*
     * This is an immutable class
     */
    private static class ImmutableClass {
        private final String data;

        public ImmutableClass(String data) {
            this.data = data;
        }

        public String getData() {
            return data;
        }
    }

    /*
     * This extends an immutable class, but is not immutable.
     */
    private static class NotSoImmutableClass extends ImmutableClass {
        private int oops;

        public NotSoImmutableClass() {
            super("WHATEVER");
        }

        public String getData() {
            return Integer.toString(oops++);
        }
    }

    /*
     * Here's some function that looks like it returns an immutable class but
     * doesn't.
     */
    private static ImmutableClass immutableClassProducer() {
        return new NotSoImmutableClass();
    }

    public static void main(String[] args) {
        /*
         * I called a method and got an ImmutableClass back.
         */
        ImmutableClass c = immutableClassProducer();

        /*
         * But why is the value changing?
         */
        System.out.println(c.getData());
        System.out.println(c.getData());
        System.out.println(c.getData());
        System.out.println(c.getData());
    }
}

How do I override methods of nested types?


Tag : delphi , By : AJacques
Date : March 29 2020, 07:55 AM
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